[320] Blake v. United States, 103 U.S. 227 (1881); Quackenbush v. United States, 177 U.S. 20 (1900); Wallace v. United States, 257 U.S. 541 (1922).
[321] Morgan v. TVA, 28 F. Supp. 732 (1939), certiorari refused March 17, 1941. 312 U.S. 701, 702.
[322] See United Public Workers v. Mitchell, 330 U.S. 75 (1947); also Ex parte Curtis, 106 U.S. 371 (1882); and 39 Op. Atty. Gen. 145 (1938).
[323] 6 Op. Atty. Gen. 220 (1853); In re Neagle, 135 U.S. 1 (1890).
[324] United States v. Lovett, 328 U.S. 303 (1946).
[325] Messages and Papers of the Presidents, II, 847 (January 10, 1825).
[326] See 328 U.S. at 313.
[327] In this connection the following colloquy between Attorney General Lincoln and the Court in course of the proceedings in Marbury v. Madison is of first importance: "Mr. Lincoln, attorney-general, having been summoned, and now called, objected to answering. * * * On the one hand he respected the jurisdiction of this court, and on the other he felt himself bound to maintain the rights of the executive. He was acting as secretary of state at the time when this transaction happened. He was of opinion, and his opinion was supported by that of others whom he highly respected, that he was not bound, and ought not to answer, as to any facts which came officially to his knowledge while acting as secretary of state. He did not think himself bound to disclose his official transactions while acting as secretary of state; * * * The court said, that if Mr. Lincoln wished time to consider what answers he should make, they would give him time; but they had no doubt he ought to answer. There was nothing confidential required to be disclosed. If there had been he was not obliged to answer it; and if he thought that any thing was communicated to him in confidence he was not bound to disclose it; * * *" 1 Cr. 137, 143-145 (1803).
[328] The following letter, dated April 30, 1941, from Attorney General Jackson to Hon. Carl Vinson, Chairman of the House Committee on Naval Affairs is of interest in this connection: "My Dear Mr. Vinson: I have your letter of April 23, requesting that your committee be furnished with all Federal Bureau of Investigation reports since June 1939, together with all future reports, memoranda, and correspondence of the Federal Bureau of Investigation, or the Department of Justice, in connection with 'investigations made by the Department of Justice arising out of strikes, subversive activities in connection with labor disputes, or labor disturbances of any kind in industrial establishments which have naval contracts, either as prime contractors or subcontractors.' Your request to be furnished reports of the Federal Bureau of Investigation is one of the many made by congressional committees. I have on my desk at this time two other such requests for access to Federal Bureau of Investigation files. The number of these requests would alone make compliance impracticable, particularly where the requests are of so comprehensive a character as those contained in your letter. In view of the increasing frequency of these requests, I desire to restate our policy at some length, together with the reasons which require it. It is the position of this Department, restated now with the approval of and at the direction of the President, that all investigative reports are confidential documents of the executive department of the Government, to aid in the duty laid upon the President by the Constitution to 'take care that the laws be faithfully executed,' and that congressional or public access to them would not be in the public interest.
"Disclosure of the reports could not do otherwise than seriously prejudice law enforcement. Counsel for a defendant or prospective defendant, could have no greater help than to know how much or how little information the Government has, and what witnesses or sources of information it can rely upon. This is exactly what these reports are intended to contain. * * *