This appeal requires us to delineate for the first time the outer boundaries of a district judge’s power to refer liability determinations to a special master. After assessing the constraints that Article III of the Constitution imposes on Fed.R.Civ.P. 53, we conclude that referring fundamental issues of liability to a master for adjudication, over objection, is impermissible. Accordingly, we vacate the judgment below.
I. THE SETTING
Plaintiff-appellee Alfred Stauble is a shareholder and director of two closely held corporations, Warrob, Inc. and Monte-chusetts Leasing Corp. The saga of Stau-ble’s shareholder suits is scarcely a short story. 1 Our burden of exegesis is reduced, *692 however, because our focus is less on the vicious infighting and Byzantine business practices that plagued the parties’ dealings inter sese than on the procedural path traversed below.
In 1978, after Stauble’s relationship with a fellow shareholder and several other directors first soured, then curdled, he brought suit in his own right and on behalf of the two corporations, alleging a host of misdeeds (including, but by no means limited to, breach of fiduciary duty, diversion of corporate assets, and misappropriation of corporate opportunities). The defendants included the shareholder with whom Stau-ble had feuded (Warren Katz); five corporate directors (Richard King, Robert Gott-segen, Larry Gottsegen, Stuart Gottsegen, and Lawrence Wald); and four corporations (Amarin Plasties, Inc., R.L.S.L. Corp., Montechusetts Chem. Corp., and Montechu-setts Chem. DISC, Inc.). Neither side requested a jury trial.
A magistrate policed discovery at the outset of the litigation. After witnessing two years of acrimonious bickering, the district court, on its own initiative, referred the case to a special master to manage pretrial discovery. 2 None of the parties objected to this reference. The discovery period extended over several years. When discovery was finally closed, the district-court adopted the master’s report in toto.
In mid-1986, the case was trial-ready. Acting sua sponte, the district court referred the case to the same special master for trial on the merits. The defendants immediately objected to the reference. Their objection was overruled and their motion to vacate the order of reference was denied. They then sought relief by way of mandamus. Concerned that the record was incomplete, we issued an order directing the court below to provide additional information as to why it thought the reference was desirable. The district court obliged. It noted, among other things, that the record was voluminous, the defendants numerous, and the issues complex; that the master’s wealth of experience, gained while overseeing discovery, augured an economy and efficiency that the court could not aspire to match; that the history of the litigation foretold a lengthy and disputatious trial, occurring at a time when the court’s docket was burgeoning; that damages were difficult to compute and would involve a full-scale accounting; and that the imbrication between the facts and the law, and between liability and damages, made it impractical to bifurcate the trial and militated in favor of a single trier. After considering the district court’s detailed response, we declined to issue an extraordinary writ.
Trial began before the master on January 12, 1988. Because Stauble’s claims turned in good measure on the defendants’ knowledge and intent, witness credibility comprised an important aspect of the trial. After approximately thirty-five trial days and the submission of over four hundred exhibits, the master resolved the credibility questions, found against the defendants, and recommended that a judgment be entered in the amount of $756,206.41. The master’s final report was submitted on January 8, 1990, a year and a half after completion of the trial.
Almost nine months later, the district court confirmed the report, accepting the master’s findings and recommendations in their entirety. Thereafter, the court entered final judgment and awarded fees in excess of $900,000 to Stauble’s attorneys, plus costs of roughly $60,000. King and Amarin Plastics have made their peace with Stauble. The other defendants appeal. 3
*693 II. STANDARD OF REVIEW
We believe that the fundamental issue before us-delineating the purview of the district court's power to refer cases to masters-presents a pure question of law. It is, therefore, appropriate that we review the exercise of that power de novo. See, e.g., Dedham Water Co. v. Cumberland Farms Dairy, Inc.,
The standard of review is not altered by reason of our earlier denial of appellants’ petition for writ of mandamus. It is, after all, black letter law that mandamus is not a substitute for direct appeal.
See In re Recticel Foam Corp.,
Because of the special standards affecting review by way of mandamus, the general rule is that the denial of a petition for mandamus is not ordinarily entitled to any preclusive effect when the unsuccessful petitioner later prosecutes his direct appeal.
See, e.g., United States v. Shirley,
III. DISCUSSION
A.
While it is axiomatic that the “judicial power of the United States must be exercised by courts having the attributes prescribed in Art. Ill,”
Northern Pipeline Constr. Co. v. Marathon Pipe Line Co.,
The realm of Fed.R.Civ.P. 53 includes, but extends somewhat beyond, these tasks. The rule empowers the district court to appoint special masters for more than these limited purposes, Fed.R.Civ.P. 53(a), but cautions that:
A reference to a master shall be the exception and not the rule_ [I]n actions to be tried without a jury, save in matters of account and of difficult computation of damages, a reference shall be made only upon a showing that some exceptional condition requires it.
Fed.R.Civ.P. 53(b). Although the parties to a civil case may consent to the appointment of a master under any circumstances, see Peretz v. United States, - U.S.
When the issues referred to a master go beyond hard-to-measure damages or an accounting, however, the waters grow more turbid. In that event, only an “exceptional condition” can justify a reference.
Id.
The Supreme Court shed some light on the meaning of the term in
La Buy v. Howes Leather Co.,
B.
In this case, Stauble urges that more than mere complexity (if an oxymoron can be forgiven) is involved. He asserts that the interweaving of liability and damages constitutes the requisite “exceptional condition.” As a practical matter, Stauble’s position has some superficial appeal. On closer scrutiny, however, the perceived im *695 brication seems to be the same old whine in a different bottle. Saying that liability and damages are inextricably intertwined is just an alliterative way of saying that a given ease suffers from a particular strain of complexity.
We need not probe this point too deeply for, in the last analysis, we cannot constitutionally forge an “exceptional condition” test for cases of blended liability and damages. The overriding consideration, applicable in this case, is that the Constitution prohibits us from allowing the nonconsen-sual reference of a fundamental issue of liability to an adjudicator who does not possess the attributes that Article III demands. Because Rule 53 cannot retreat from what Article III requires, a master cannot supplant the district judge.
Accord In re Bituminous Coal Operators’ Ass’n, Inc.,
To be sure, Article III does not require that a district judge find
every
fact and determine
every
issue of law involved in a case. In respect to preparatory issues (such as, say, the appropriateness of class certification) or consummatory, remedy-related issues (such as, say, the performance of an accounting), when the reference otherwise comports with Rule 53 a master may be appointed to make findings of fact and recommend conclusions of law. By the same token, a master who is appointed to oversee pretrial discovery will often investigate the parties’ compliance with the relevant Federal Rules as part of his or her factfinding. As long as the district court discerns sufficient supporting evidence and is satisfied that the master applied the correct legal standards, it may rely on the master’s report as part of its own determination of liability.
See, e.g., Crowell v. Benson,
Yet, there is an important distinction between such collateral issues, on the one hand, and fundamental determinations of liability, on the other hand. The former comprise table setting and table clearing, while the latter comprise the meal itself. As the Court has observed, where a district judge does not hear and determine the main course,
i.e.,
the meat-and-potatoes issues of liability, there is an “abdication of the judicial function depriving the parties of a trial before the court on the basic issues involved in the litigation.”
La Buy,
*696 C.
In plotting the intersection where Article III and Rule 53 cross, we do not write on a pristine page. The four circuit courts that have confronted this issue in the post-
Northern Pipeline
era have refused to allow references of liability to masters over timely objection.
8
See In re Bituminous,
Here, the district court, understandably frustrated with the snail’s pace of the litigation, referred the entire case to a special master for findings of fact and conclusions of law, with no boundaries on the master’s authority and no provision for anything remotely resembling de novo review. The court lacked the authority to handle the case in this fashion. Nonconsensual reference of fundamental issues of liability to a master for adjudication is not consonant with either Rule 53 or Article III.
D.
Nor does the district court's summary confirmation of the master’s final report rend harmless the overly ambitious reference. The court’s entire rescript consumed less than two pages and stated that the judge’s review “was made in the light of the strong presumption of validity” that he accorded to the master’s findings and conclusions. We have regularly held that the mere “laying on of hands” by a district judge who adopts a magistrate’s or master’s recommendation of liability
pro for-ma
cannot inoculate a proceeding against the pathology that invariably follows from noncompliance with Article III.
See Reed v. Board of Election Comm’rs,
Like the bark of a dog to Sherlock Holmes,
see
Arthur Conan Doyle, Silver Blaze, in
The Complete Original Illustrat
*697
ed Sherlock Holmes
117 (1976), the indicia of independent review are telling in this case by their absence. The district court adopted the master’s report without a hearing, without any stated analysis of the evidence, and without any discussion of the master’s legal conclusions. A master's legal conclusions, unlike his or her findings of fact, must be reviewed
de novo. See Polin v. Dun & Bradstreet, Inc.,
IV. THE REMEDY
This litigation recently mourned its fourteenth anniversary. It has already consumed inordinate time and resources. 10 At this point, the principal beneficiaries are the litigators, not the litigants: the award of attorneys’ fees already dwarfs the award of damages.
Against this lugubrious backdrop, the ap-pellee argues that, even if the lower court lapsed into error, we ought not to perpetuate the litigation, but should decide it here and now. In support of this proposition, he cites
Adventures in Good Eating, Inc. v. Best Places to Eat, Inc.,
Despite our fervent wish that it were otherwise, this is not such a case. Unlike
Adventures in Good Eating,
the record in
*698
this case is voluminous, the factual issues are tangled, and the legal issues are largely factbound. On several key points, the testimony is capable of supporting conflicting conclusions. Credibility is vital to a reasoned determination of the litigation. In such straitened circumstances, even the most searching review of the record by an appellate court would not be a satisfactory substitute for a trial conducted in accordance with Article III.
See Dedham Water,
V. CONCLUSION
Article III requires that the judicial power of the United States be exercised by federal judges appointed for life tenure and protected from diminished compensation. Although parties to litigation may agree, at the behest of a judge or at their own contrivance, to make alternative arrangements for dispute resolution at the hands of judicial assistants or even private citizens, parties who object to such a departure may not be forced to have the fundamental issues of their disagreement, which would otherwise come within the jurisdiction of an Article III court, decided by non-Article III surrogates. 13 It follows that, in this instance, the district court delegated too much judicial power by asking a special master, over the defendants’ timely objection, to determine the entire case, liability included.
We need go no further. The order of reference is reversed, the judgment below is vacated, and the cause is remanded to the district court for a new trial. All parties shall bear their own costs.
So Ordered.
Notes
. Although Stauble brought two suits, the cases were consolidated below. Hence, we treat them as if they comprised a single civil action.
. The district court selected as special master the Honorable Walter H. McLaughlin, Sr., a retired chief judge of the Massachusetts Superi- or Court. Judge McLaughlin’s credentials are conceded by all concerned.
. The two appeals parallel the two underlying lawsuits. See supra note 1. Although the appeals focus primarily on the propriety of the district court's reference of the liability determination to a master, the defendants assign error in other respects as well. Inasmuch as we remand for a new trial before the district court, see infra, we do not pass upon the additional assignments of error.
. To be sure, appellants were forced to undergo a trial before they could test the validity of the order of reference on direct appeal. But, we have consistently "rejected the general burden-someness of litigation as a basis for assuming mandamus jurisdiction.”
In re Justices of the Supreme Court of Puerto Rico,
. While Article III courts also review determinations of adjudicators who do not possess Article III stature, the Supreme Court has long recognized distinctions between judicial assistants (such as masters) and, for example, administrative courts. See
generally Northern Pipeline,
. Inexplicably, the
Armco
court indicated that it would have approved the determination of
dis-positive
pretrial motions by the master.
In re Armco,
. We think it is instructive that in drafting the Federal Magistrates Act of 1979, codified as
*696
amended at 28 U.S.C. §§ 631-639 (1988), Congress was careful to avoid granting magistrates the power to rule on dispositive motions or determine liability without the parties’ consent. Magistrates may proffer recommendations on such matters, but, if any party objects, the district court must make a
de novo
determination, which may include recalling witnesses where credibility is critical to the inquiry.
See
28 U.S.C. § 636(b)(1)(B). We have previously warned that if a magistrate's authority was not so limited, "we would find this ... troubling indeed."
Goldstein,
. Some circuits have not decided the issue directly, but have authored dicta supportive of one position or the other.
Compare, e.g., Jack Walters & Sons Corp. v. Morton Bldg., Inc., 737
F.2d 698, 712-13 (7th Cir.) (if objection had been preserved, the court “might well [have] reverse[d]" reference of summary judgment proceedings to a master),
cert. denied,
. The record on appeal contains no transcript of the trial before the master. The district court docket does not show that a transcript was filed (or even prepared). The district judge’s rescript does not mention a transcript. In what seems a contrary vein, the rescript recites that the court reviewed "the Special Master’s Final Report and defendants’ objections thereto," along with "the plaintiffs application for adoption of the Final Report, supporting memorandum and appendices, and, finally, the defendants’ opposition.”
. The history of these lawsuits bears out the Court’s warning that indiscriminate references of cases to masters may actually increase, rather than shorten, the amount of time necessary to bring litigation to fruition.
See La Buy,
.Stauble also relies on
Johnson Fare Box Co. v. National Rejectors, Inc.,
. At oral argument before us, Stauble conceded that, if we found the proceedings below to have been constitutionally deficient and declined to decide the merits ourselves, the appropriate remedy on the facts of this case would be a full new trial before the district court. Because the parties agree on this point, we leave for another day the possibility that a master’s findings and conclusions on a fundamental issue of liability might perhaps be salvaged, even after appeal, by having the district court conduct a deeper, more participatory sort of review.
. A judge may, of course, refer the fundamental issue of liability to a master without running afoul of the Constitution, so long as the judge is prepared to afford de novo review or otherwise to honor Article Ill’s commands.
