OPINION OF THE COURT
We here consider a petition by NL Industries, Inc. (NL) for a writ of mandamus to compel the nominal respondent, Daniel J. Snyder, Jr., District Judge, to consider the merits of NL’s motion for a protective order respecting certain documents. The documents were furnished to a grand jury by NL, pursuant to a subpoena. When the grand jury indicted several parties, not including NL, the government proposed to disclose to the defendants all documents produced before it. NL then moved for a protective order to prevent or limit disclosure of 54 documents which had been subpoenaed from it. Without examining the documents or considering the merits of NL’s objections to disclosure, the district court denied the motion. This petition followed. We conclude that the district court should have examined the documents and considered the merits of NL’s objections, and we direct that he do so.
I. FACTS AND PROCEEDINGS IN THE DISTRICT COURT
Between Decеmber 1976 and September 1978 a grand jury in the Western District of Pennsylvania investigated alleged price fixing in the titanium metals industry. In the course of that investigation the grand jury subpoenaed documents from a number of corporations. A subpoena duces tecum to NL requested, .among other things,
*1185 All documents which relate or refer to the sale, acquisition, merger or consolidation of any interest in any company engaged in the production or salе of titanium products, or any proposed or contemplated sale, acquisition, merger or consolidation of such an interest.
Although the subpoena was rather broad when considered in light of possible relevance to a price-fixing investigation, NL complied, furnishing thousands of papers, including documents dealing with its 50% joint ownership, with Allegheny Ludlum Steel Co., of a titanium producer, Titanium Metals Corporation of America (TMCA).
On Septembеr 28, 1978, the grand jury indicted four corporations and five individuals for price fixing in violation of the Sherman Act, and named TMCA as an unindict-ed co-conspirator. NL was neither indicted nor named as a co-conspirator. Shortly after the return of the indictment, several defendants moved pursuant to Fed.R. Crim.P. 16(a)(1)(C) for discovery of certain documents. The response of the government was to move on November 1,1978, for the entry of an order granting each defendant access to all grand jury documents. The government notified those firms, including NL, who had responded to subpoenas duces tecum that it now proposed to make all the grand jury documents available to the defendants. In response to the government’s notice, NL objected to disclosure of certain documents. It pointed out that it is engaged in producing steel products, as are several of the defendants, and that it wоuld be prejudiced by the unprotected disclosure of the documents, containing as they do highly confidential and proprietary business information concerning the financial affairs of NL and TMCA, as well as business policy decisions by top executives of both companies. NL moved for a protective order.
At a pretrial hearing on November 29, 1978, the district court entertained various motions regarding the requested grand jury documents. RMI Company, one of the defendants, proposed an order that would place all grand jury documents in a document depository, available to defense counsel, defense experts, and any party or its officers or employees required to work on the litigation. NL sought a more restrictive protective order which would have limited the disclosure of certain critical documents solely to defense counsel and outsidе experts employed by defense counsel, at least absent a showing of materiality to the defense. The district court ruled against NL, which then filed a motion for reconsideration, restricting its application to 54 specific documents out of the thousands it had furnished. The court acknowledged that it might be naive to assume that defendants could so isolate confidential information that they would not, as competitors of NL, gain commercial advantage through the proposed disclosure. Nevertheless, on December 14, 1978, without examining the 54 documents, or making any determination of their materiality pursuant to Rule 16(a)(1)(C), the court denied NL’s motion and entered an order allowing access to all grand jury documents by defendants and their counsel “solely for the purposes of prosecuting or defending against the criminal charge in this action . . . [not] for any commercial аdvantage.” The NL petition for mandamus followed.
II. PROPRIETY OF MANDAMUS RELIEF
Under the All Writs Act, 28 U.S.C. § 1651, all federal courts “may issue all writs necessary or appropriate in aid of their respective jurisdictions and agreeable to the usages and principles of law.” The statute is conjunctive; the writ must be both in aid of jurisdiction and agreeable to the law governing the use of prerogative writs. Since this court does not have a general original jurisdiction, we can issue а writ of mandamus only in aid of some present or potential exercise of appellate jurisdiction.
Roche v. Evaporated Milk Assn.,
In the pending criminal case the district court’s grant of defendants’ Rule 16 request could not be reviewed at the behest of the parties even after a conviction. The government proposed the disclosure of all grand jury documents, and thus would not be aggrieved. The defendants were being tendered even greater discovеry than they had originally sought, and thus could not press the ruling as a ground for reversal of a conviction. 2 Our potential appellate jurisdiction over the judgment of sentence, 28 U.S.C. § 1291, and over other aspects of the criminal proceedings, 18 U.S.C. § 3731, is therefore irrelevant. We can only entertain the petition if NL’s own interest in the ruling is somehow within our potential appellate jurisdiction.
We conclude that NL meets this requirement. In
Perlman v. United States,
That does not end the inquiry, however, for the presence of potential appellate jurisdiction may implicate the oft-repeated dictum that а petition for mandamus will not ordinarily be granted where an adequate appellate remedy otherwise exists.
E. g., Schlagenhauf v. Holder,
III. THE MERITS
This case requires us to consider the interplay of two provisions of the Federal Rules of Criminal Procedure. Rule 16(a)(1)(C) provides the standards for a defendant’s discovery of documents and tangible objects which are within the government’s control. 3 Rule 6(e), on the other hand, requires that a veil of secrecy generally aрply to grand jury proceedings. 4 The question posed in this case is whether, when documents are sought which were first obtained during a grand jury investigation, the secrecy policies of Rule 6(e) have any *1188 impact on discovery proceedings under Rule 16(a)(1)(C).
Rule 16(a)(1)(C) permits a defendant to discover documents in the government’s possession where they (1) “are material to the preparation of [the] defense”; or (2) “are intended for use by the government as evidence in chief at the trial”; or (3) “were obtained from or belong to the defendant.” There has been no argument that reason (2) applies, and reason (3) is plainly inapposite. As for reason (1), the defendants never made any showing to the trial court that the 54 documents whose content NL wishes to protect are material to their defense. Nor did the trial judge do anything independently to satisfy himself of the documents’ materiality. Facially, then, there would seem to be a violation of the materiality command of Rule 16(a)(1)(C).
Were this a case where the
government
objected to the discovery of documents on the ground that there was no showing of their materiality, a court would not hesitate to deny the defendants’ Rule 16(a)(1)(C) request. In
United States v. Buckley,
Materiality means more than that the evidence in question bears some abstraсt logical relationship to the issues in the case. . . There must be some indication that the pretrial disclosure of the disputed evidence would have enabled the defendant significantly to alter the quantum of proof in his favor.
Id.
(quoting
United States v. Ross,
Yet, the third party here originally furnished the documents in reliance on the secrecy provisions of Rule 6(e). Plainly, the policies behind Rule 6(e) secrecy are implicated by the pre-trial production of grand jury documents. The secrecy of grand jury proceedings exists, in part, to encourage witnesses to testify without fear of retaliation.
Posey v. United States,
Defendant RMI Company contends that Rule 6 has never been used “as a means for limiting the liberal discovery available under Rule 16.” Brief of Respondent, at 9. The two rules, RMI asserts, provide alternative bases for discovery. Rule 6(e), since it ostensibly applies to all parties, imposes a heavier burden to show a “particularized need.” Id. “Rule 16, on the other hand, limits discovery to defendants in a criminal case, and recognizing the constitutional rights (and particularized need) that all defendants in a criminal action have, employs the more liberalized test of ‘materiality.’ ” *1189 Id. -But that argument merely suggests that the Rule 16 materiality standard should not be read more stringently than otherwise when it is grand jury documents which are sought. It does not address the possibility that third parties may have standing to insist that “the more liberalized test of ‘materiality’ ” at least be observed.
No case has been called to our attention dealing with a third party’s interest in enforcement of Rule 6(e) in the Rule 16 context. In
Douglas Oil Company of California v. Petrol Stops Northwest,
- U.S. -,
To like effect is
State of Illinois v. Sarbaugh,
In the instant casе, NL Industries has also come forward with a reason why it would be adversely affected by the disclosure of certain documents to the corporate defendants. To be sure, the documents were sought by the defendants under Rule 16(a)(1)(C), and not under Rule 6(e), because they are to be used in a criminal, not civil, proceeding. But that difference is adequately accounted for in the lower “materiality” threshold of discovery under Rule 16 (as opposed to the “particularized need” standard which has been held applicable to Rule 6(e)). Since the policies of secrecy apply both to criminal trials under Rule 16 and to civil actions under Rule 6, the analysis of the Douglas Oil and Sarbaugh Courts seems eminently applicable.
Apart from the policies surveyed above, there are additional reasons to permit third parties to be heard in defense of grand jury secrecy at the stage of a Rule 16 motion. To the extent that the grand jury may be considered, the creature of the executive branch of government, the government is in actual possession of the docu
*1190
ments and can ordinarily assert their confidentiality.
See In re Grand Jury Proceedings (Schofield),
In this case the court never ruled upon the merits of NL’s contentions. No showing of materiality was required, and no determination was made about confidentiality.
IV. CONCLUSION
Since the district court never ruled on the merits of the NL application, the order of December 14, 1978 must be vacated. Since we assume that the District Judge will treat our disposition as the equivalent of an appeal, and will proceed with a determination of the merits of NL’s application, a writ of mandamus need not issue. No costs.
Notes
. The Second Circuit has taken the position that § 1651 authorizes a “supervisory” review of district court actions which could never be reviewed on appeal. See, e. g.,
United States v. Weinstein,
. This case is thus distinguishable from the instancеs of mandamus cited by petitioner NL, all of which issued at the behest of one of the parties who, presumably, could have asserted the same claims on appeal.
See, e. g., Harper & Row Publishers, Inc. v. Decker,
. Rule 16(a)(1)(C) provides:
Upon request of the defendant the government shall permit the defendant to inspect and copy or photograph books, papers, documents, photographs, tangible objects, buildings or places, or copies of portions thereof, which аre within the possession, custody or control of the government, and which are material to the preparation of his defense or are intended for use by the government as evidence in chief at the trial, or were obtained from or belong to the defendant.
. Rule 6(e) provides, in pertinent part:
Disclosure of matters occurring before the grand jury other than its deliberations and the vote of any juror may be made to the attorneys for the government for use in the pеrformance of their duties: Otherwise a juror, attorney, interpreter, stenographer, operator of a recording device, or any typist who transcribes recorded testimony may disclose matters occurring before the grand jury only when so directed by the court preliminarily to or in connection with a judicial proceeding or when permitted by the court at the request of the defendant upon a showing that grounds may exist for a, motion to dismiss the indictment because of matters occurring before the grand jury.
