delivered the opinion of the court.
Section 51 .of the Judicial Code declares that (with exceptions not here material) “no civil suit shall be brought in any district court against any person by any original process or proceeding in any other district than that whereof he is an inhabitant; but where the jurisdiction-is founded only on the fact that the action is between citizens of different States, suit shall be brought only in the district of the residence of either the plaintiff or the defendant.”
Resting jurisdiction wholly on diversity of citizenship, Gress, a citizen and resident of Florida, brought, in the District Court of the United States for the Eastern District of Virginia, this action against P. D. Camp, P. R. Camp, and John M. Camp, alleging them to be citizens of Virginia and residents ~ of that district. One of them, John M., filed a “plea to jurisdiction,” asking that the suit be dismissed, because he was not a citizen or resident of the district in which it was brought, but a citizen of North Carolina, resident in the Eastern District thereof. P. D. and P. R. Camp filed a separate “plea to jurisdiction” setting up the same facts, alleging that the cause of action sued on was joint and inseparable, and denying jurisdiction as to themselves also, because there was none as to John M. Camp. The pleas were overruled; the case рroceeded to trial; a verdict was rendered against the three defendants, and judgment was entered thereon. Exceptions had been duly taken both by John M. and by. P. D. and P. R. Camp to. the decision overruling their pleas to the jurisdiction, and by the three defendants to certain rulings at the trial alleged to be erroneous; but
*311
the judgment was affirmed by the Circuit Court of Appeals. 244 Fed. Rep. 121. A writ of certiorаri was granted by this court.
First.
The several defendants below, although not citizens of the same State, were all citizens of States other than that of the plaintiff. Hence, the diversity of . citizenship requisite to federal jurisdiction existed.
Sweeney
v.
Carter Oil Co.,
Section 51 of the Judicial Code embodies in substance the Act of March 3, 1887, c. 373, § 1, 24 Stat. 552, as corrected by Act of August 13,1888, c. 866, § 1, 25 Stat. 433. From the passagе of the original Judiciary Act (September 24, 1789, c. 20, § 11, 1 Stat. 73, 79), until 1887, suit could be brought not only in the district of defendant’s resi
*312
dence, but also in any other district in which the defendant was found. The 1887-1888 act accomplished its purpose of restricting the jurisdiction of the federal courts, in .part, by limiting the districts in which suit might be brought to that of the defendant’s or of the plaintiff’s residence. See
In re Keasbey & Mattison Co.,
It is said, however, that § 51, if read in connection with § 50 and in the light of their legislative history, shows that it was the intention of Congress to confer jurisdiction over all the defendants found within the district, if one of them resides therein. Section 50, 1 which embodies without substantial change the Act of February 28,1839, c. 36, § 1, 5 Stat. 321, makes provision for enforcing a cause of action which exists against several persons, although one of them is neither an inhabitant of nor found within the district in which suit is brought and does not voluntarily appear. It does so by permitting the court to entertain jurisdiction without prejudice to the rights of the party not regularly served nor voluntarily appearing. The argument is that, in order to give *314 effect to the retention hr§ 50 of the words “found within the district,” we must, although these words were omitted -from~§ 51, hold that where there are several defendants the court has jurisdiction of all, if one or more are residents of the district and the others are found there. The argument overlooks the fact that § 50 is aрplicable not only to cases in which the venue is dependent upon the residence of a defendant in the district where suit is brought, but also to those cases in which it is dependent upon the residence of the plaintiff. Ordinarily jurisdiction could be obtained in the district of the plaintiff’s residence only over nonresidents; because all of the defendants must be nonresidents in order to satisfy the requirement of diversity of citizenship.' ..And as to these there can be personal jurisdiction only So. far as found within or voluntarily appearing within the district. .To such persons the term “inhabitants” in § 50 obviously cannot refer. If the provision therein concerning those not .“found” had been omitted, a suit would fail in case any one of those who at common law was a necessary party, defendant should not be. fоund therein or voluntarily appear. Shields v. Borrow, 17. How. 130. As the Act of 1887-1888 did not restrict jurisdiction based on diversity of citizenship in those cases where the venue is determined by the residence of the plaintiff, it was appropriate, to retain in the earlier statute (now § 50) the words “found within the district,” although it had ceased to be operative in cases where the venue is determined by the residence of the defendants*
On the other, hand, § 52 of the Judicial Code makes it clear that the construction contended for by defendant is unsound. It provides that where a State contains more than one district a suit (not of a local nature) against a single defendant must be brought in the district where he resides, “but if there are two or more defendants,' residing in different districts of the State, it may be
*315
brought in either district.” We thus have an express declaration by Congress that under one particular set of circumstances a co-defendant may be sued in a district in which he does not reside.
Expressio unius est exclusio alterius.
This section follows directly after that which contains the general prohibition against suing a. defendant in a district other than that in which he or the plaintiff resides, and constitutes one of the specified exceptions to the general prohibition. It shows, therefore, that the prohibition of §51 expresses the deliberate purpose of Congress that a person shall not be compelled to submit to suit in the federal District Court in a State within, which neither he nor the plaintiff resides, although a co-defendant may reside therein.' The history of § 52 confirms this conclusion. It is substantially a reenactment of § 740 of the-Revised Statutes. After the pаssage of the Act of 1887-1888 restricting the jurisdiction of the federal courts, considerable doubt arose as to whether the provisions of that act now contained in § 51 of the Judicial Code did not repeal § 740 of the Revised Stat-. utes. Compare
Petri
v.
Creelman Lumber Co.,
No reason appears, therefore, for refusing to apply here the rule of Smith v. Lyon, supra. The objection made below that tie plea to the jurisdiction is bad because not limited by its terms to the question of jurisdiction over the particular defendant is highly technical, and was hardly insisted upon here; and the contention that his exemption from suit was waived by the acknowledgment on the summons of service is clearly unfounded. John M. Camp properly asserted his privilege by plea to the jurisdiction, and the plea should have been sustained. It follows that the judgment against him is void; that the judgment of the Circuit Court of Appeals, in so far as it affirms the judgment of the District Court against him, should be reversed; and the suit should be dismissed as\to him.
Second.
The plea to the jurisdiction filed by P. D. and P. R. Camp was properly overruled. The objection was based wholly on the fact that John M. Camp was not suable within the district. This is an exemption from suit personal to the nonresident of the district. A resident co-defendant cannot avail himself of the objection.
1
If John M. had been an indispensable party, the failure to obtain jurisdiction over him would, of course, be fatal to the maintenance of the suit.
Barney
v.
Baltimore City,
Third.
P. D. Camp and P. R. Camp contend that, in view of the error in overruling John M. Camp’s plea to the jurisdiction and proceeding to judgment against him,' the court may not confine its action to correcting the error by setting aside the judgment and dismissing the suit as to him, but must set aside the judgment as against all the defendants, thus requiring a. new trial as against the other two. But this is not a necessary result of erroneously retaining jurisdiction over John M. Camp; for, as abovе shown, John M. was not am indispensable party to a suit to enforce the liability of ,the other two joint obligors; and if the trial court had sustained his plea .to the jurisdiction, the suit might, under § 50 of the Judicial Code, have proceeded to judgment as against the other defendants. Whether the error committecf in retaining jurisdiction over John M. requires a reversal of the judgment as against the other defendants dеpends upon whether that error may have prejudiced thém. The record does not show that the error committed could have prejudiced. them in any way; and their counsel admitted at the bar that the error had not prevented them from availing themselves of any defense, and had not influenced the admission or rejection of evidence, or the granting or refusal of any instruction asked or given. Only error which may have resulted in prejudice could justify reversal of a judgment. Compare
Yazoo & Mississippi Valley R. R., Co.
v.
Mullins,
It is, however, contended that the Virginia practice would require a reversal of the judgment as against, all defendants, and that the Conformity Act (Revised .Statutes, § 914) requires' that the state practice be followed. If such were the Virginia practice, which is denied, it
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would not be binding on this court. The Confоrmity Act by its express terms refers only to proceedings in District (and formerly Circuit) Courts and has no application to appellate proceedings either in this court or in the Circuit Court of Appeals.. Such proceedings are governed entirely by the acts of Congress, the common law, and the ancient English statutes.
United States
v.
King,
The error in retaining jurisdiction over John M. Camp, does not, therefore, require that the judgment as against the other two defendants be set aside.
Fourth.
P. D. and P. R. Camp contend, however, that thé judgment against them should be reversed also on the ground that there was error in the instructions as to the measure of damages. The contention must be examined, as the whole case is here on writ of certiorari and the objection was properly saved,
hatcher & Moore Lumber Co.
v.
Knight,
*319 Gress was the owner of the entire capital stock of the Morgan Lumber Company, a corporation which held the title to saw-mill properties in Florida. The three defendants Camp were the ownеrs of valuable timber lands near the mill. By contract under seal dated August 18, 1913, the Camps agreed to join with Gress in organizing a corporation under the name of Levy County Lumber Company to which Gress.would convey the sáw-mill properties which the parties valued at $125,000, and the Camps would convey the timber lands which they valued at $325,000; that Gress should receive, in exchange for the mill properties, five-eighteenths of the stock in the new company and the Camps, in exchange for the lands, thirteen-eighteenths of the stock; and that' the parties should in that proportion finance the company.' Gress was ready and willing and able to perform his part of the contract; and the Camps broke it by definitely refusing to perform. The only question in the case seriously controverted was the amount of damages recoverable. There was evidence that by reason of the breach of contract which resulted in depriving the mill of its timber supply its value depreciated heavily. The trial judge charged the jury that among the elements of damages recoverable was the amount of the depreciation in the market value of the mill between the date of the contraсt and the date of the breach. The objection made to this ruling was based wholly on the ground that, as the mill properties were vested in the Morgan Lumber Company, Gress could not recover more than nominal damages, although he owned all of its stock. The contention is that beforé it could be determined whether plaintiff, as owner of the stock of the Morgan Lumber Company, sustained any damages by reason of the depreciation in value of the mill property, an accounting and settlement of the Morgan Lumber Company’s affairs would be necessary; and it is urged that the lower court, in rejecting a ruling to that *320 effect and in charging as it did, held erroneously that the person who owns the entire capital stock of a corporation is in fact and in law identical with the corporation.
The contention appears to rest upon a misapprehension of the plaintiff’s position. The contract recited that Gress owned the mill, and that the title only was in the Morgan Lumber Company. If so, the depreciation would clearly be a loss suffered by Gress, and he could recover as compensation an amount equal to that loss, since he was equitable owner with power to require an immediate conveyance of the legal title. There was also introduced in evidence a vote of the directors of the Morgan Lumber Company, which, referring to the contract of August 18, 1913, as having been made by Gress “representing the Morgan Lumber Company, ” approved the same “in its entirety.” There was not a particle of evidence that any other person had any interest of any kind in the corporation or its assets. Consequently, whether Gress entered into the contract technically on his own behalf or technically as agent for the corporation, his undisclosed principal, is immaterial. In either case the suit is one brought by him individually; in either case all the loss suffered through defendants’ breach of contract is rеcoverable by Gress; in either case the measure of damage is the same. 1 There is no basis for the contention that an accounting and settlement of the Morgan Lumber Company’s affairs was necessary in order to deterpaine the amount of plaintiff’s loss; and the failure to require such an accounting does not involve any disregard of the corporate entity.
The deсision of the Circuit Court of Appeals denying the contention that the plaintiff was entitled to recover only thirteen-eighteenths of the loss due to the depre *321 ciation in the mill properties was clearly correct. If the jury, believed as contended that defendants’ breach of contract, by depriving those properties of a timber supply, reduced their value, the plaintiff’s lоss in that respect w.as the whole of the reduced value. On the other hand, if the market value of the timber lands increased, the plaintiff’s loss from being deprived of the gain from this source was, as the court ruled, only five-eighteenths of that gain. There was no other objection taken which requires us to consider whether the rulings as to damages were in other respects proper. ‘
The judgment as to P. D. Camp and P. R. Camp is affirmed and as to John M. Camp is reversed and the case as so modified is remanded to the District Court of the United States for the Eastern District of Virginia with directions to dismiss the suit as to John M. Camp.
Modified and affirmed.
Notes
E. g., Turk v. Illinois Cent. R. Co., 218 Fed. Rep. 315, 316 (C. C. A., Sixth Circuit); Excelsior Pebble Phosphate Co. v. Brown, 74 Fed. Rep. 321 (C. C. A., Fourth Circuit); Revett v. Clise, 207 Fed. Rep. 673, 676 (Wash.); Schultz v. Highland Gold Mines Co., 158 Fed. Rep. 337, 340 (Oreg.); Tice v. Hurley, 145 Fed. Rep. 391 (Ky.); Lengel v. American Smelting & Refining Co., 110 Fed. Rep. 19, 21 (N. J.); Bensinger Self-Adding Cash Register Co. v. National Cash Register Co., 42 Fed. Rep. 81 (Mo.). But see Jennings v. Smith, 232 Fed. Rep. 921, 925 (Ga,); Rawitzer v. Wyatt, 40 Fed. Rep. 609 (Cal.).
“When there are several defendants in any suit at law or in equity, and one or more of them are neither inhabitants of nor found within the district in which the suit is brought, and do not voluntarily appear, the court may entertain jurisdiction, and proceed to the trial and adjudication of the suit between the parties who are properly before it; but the judgment or decree rendered therein shall not conclude or prejudice other parties not regularly served with process nor voluntarily appearing to answer; and non-joinder of parties who are not inhabitants of nor found within the district, as aforesaid, shall *not constitute matter of abatement or objection to the suit.”
See also Doscher v. United States Pipe Line Co., 185 Fed. Rep. 959; John D. Park & Sons Co. v. Brum; 133 Fed. Rep. 806; New Jersey Steel & Iron Co. v. Chormann, 105 Fed. Rep. 532; Goddard v. Mailler, 80 Fed. Rep. 422; East Tennessee, V. & G. R. Co. v. Atlanta & F. R. Co., 49 Fed. Rep. 608.
Tice v. Hurley, 145 Fed. Rep. 391, 392; Chesapeake & O. Coal Agency Co. v. Fire Creek Coal & Coke Co., 119 Fed. Rep. 942; Smith v. Atchison, T. & S. F. R. Co., 64 Fed. Rep. 1, 2; Jewett v. Bradford Sav. Bank & Trust Co., 45 Fed. Rep. 801; Bensinger Self-Adding Cash Register Co. v. National Cash Register Co., 42 Fed. Rep. 81, 82.
United States Telegraph Co.
v.
Gildersleve,