*324 Opinion of the Court by
announced by the Chief Justice.
The District Court for the Northern District of Cali-, fornia denied motions! to quash' subpoenas
duces tecum
addressed to the petitioners and directing them to appear and produce documents before a United States grand jury at the July, 1939, term of that court. From the denial of these motions petitioners sought review by way of appeal to the Circuit Court of Appeals for the Ninth Circuit,
Finality as a condition of review is an historic characteristic of federal appellate procedure. It was written into the first Judiciary Act
2
and has been departed from only when observance of it would practically defeat the
*325
right to any review at all.
3
Since the right to a judgment from more than one court is a matter of grace and not a necessary ingredient of justice, Congress from the very beginning has, by forbidding- piecemeal disposition on appeal of what for practical purposes is a single controversy, set itself against enfeebling judicial administration. Thereby is avoided the obstruction to' just claims that would come .from permitting the harassment and cost of a succession of separate appeals from the various rulings to which a litigation may give rise, from its initiation to entry of judgment. To be effective, judicial administration must not be leaden-footed. Its momentum would be arrested by permitting separate reviews of the. component elements in a unified cause. These considerations of policy are especially compelling in the administration of criminal justice. Not until 1889 was there review as of right in criminal cases.
4
An accused is entitled to scrupulous observance of constitutional safeguards. But encouragement of delay is fatal to the vindication of the criminal law. Bearing the discomfiture and cost of a prosecution for crime eveá by an-innocent person is one of the painful obligations of citizenship. The correctness of a trial court’s rejection ’ even of a constitutional claim made by the accused in the process of prosecution must await his conviction"'
*326
before its reconsideration by an appellate tribunal.
Cogen
v.
United States,
In thus denying to the appellate courts the power to reyiew rulings at
nisi, prius,
generally, until after .the entire controversy has been concluded, Congress has sought to achieve the effective conduct of litigation. For purposes of appellate procedure, finality — the idea underlying “final judgments and decrees” in the Judiciary Act of 1789 and now expressed , by “final decisions” in § 128 of the Judicial Code — is not a technical concept of temporal or physical termination. It is the means for achieving a healthy .legal system. As an instrument of such policy the requirement of .finality will be enforced not only against a party to the litigation but against a witness who is a stranger to the main proceeding. Neither a. party nor a non-party witness will be allowed to take to the upper court a ruling where the result of review will be “to halt in the orderly progress of a cause and consider incidentally a question which has happened to cross the path of such litigation . . .” Mr. Chief Justice Taft, in
Segurola
v.
United States,
*327 “In a certain sense finality can be asserted of the orders under review, so, in a certain sense, finality can be asserted of any order of a court. And such an order may coerce a witness, leaving to him no alternative but to obey or be punished. It may have the effect and the same characteristic of finality as the orders under review, but from such a ruling it will not be contended there is an appeal. Let the court go further and punish the witness for contempt of its order, then arrives a right of review, and this is adequate for his protection without unduly impeding the progress of the case . . . This power to punish being exercised the matter becomes, personal to the witness and a judgment as to him. Prior to that the proceedings are interlocutory in the original suit.”201 U. S. at 121-22 .
We must now decide whether the situation of a witness summoned to produce documents before ¿ grand jury is so different from that of the witness in the
Alexander
ease that the sound considerations of policy controlling there should not govern here. The Constitution itself makes the grand jury a part of the judicial process. It must initiate prosecution for the most important federal crimes. It does so under general instructions from the court to which it is attached and to which, from time to time, it reports its findings. The proceeding before a grand jury constitutes “a judicial inquiry,”
Hale
v.
Henkel,
This analysis of finality is. illustrated by
Perlman
v.
United States,
247 U. S.
7.
5
There, exhibits owned by-Perlman and- impounded in court during a patent suit were, on motion of the United States attorn -y, directed to be produced before a grand jury. Perlman petitioned the district court to prohibit this use, invoking a constitutional privilege. This petition was denied and Perlman sought review here. The United States claimed that the action of the district court was “not final” but merely interlocutory and therefore not reviewable by this Court. We rejected the Government’s contention. To have held otherwise would have rendered Perlman “powerless to avert the mischief of the order . . .”
One class of cases dealing with the duty of witnesses to testify presents differentiating circumstances. These cases have arisen under § 12 of the Interstate Commerce Act, whereby a proceeding may be brought in the district court to compel testimony from persons who have refused to make disclosures before the Interstate Commerce Commission.
7
In these cases the orders of the district court directing the witness to answer have been held final and reviewable.
Interstate Commerce Comm’n
v.
Brimson,
We deem- it unnecessary to say more in sustaining the Circuit Court of Appeals. The challenged judgment is
Affirmed.
Notes
Section 128 (a) provides that, “The circuit courts of appeal shall have appellate jurisdiction to review by appeal final decisions. . . .” Similar language was used in the Act of 1891, c. 517, 26 Stat. 828.
§§ 21, 22, 25 of the Act of September 24, 1789, 1 Stat. 73, 83-85. For a discussion of the historical background, English and American, of the fi: iality concept, see Crick, The Final Judgment as a Basis for Appeal, 41 Yale L. J. 539.
See § 129 of the Judicial Code, 28 U. S. C. § 227, dealing with appeals from interlocutory injunctions, appeals from interlocutory-decisions in receiy.ership cases and from interlocutory decrees determining rights and liabilities in admiralty litigation.
See
United States
v.
More,
Compare
Go-Bart Co.
v.
United States,
Burdeau
v.
McDowell,
25 Stat. 858; 49 U. S. C. § 12.
