forty-two to which plaintiff’s demand had been narrowed. These were listed and described in an affidavit by an attorney in the Commission’s Office of General Counsel as “internal memoranda.” Ash Grove asserts that the description of each document given by the FTC affidavit is so conclusory as to be of little aid to the trial court and, therefore, legally insufficient under Vaughn v. Rosen5 and others of our FOIA decisions. The District Judge found, on the other hand, that “[t]hese descriptions are more than mere conclusions.”
Our review of the descriptions of the forty-two documents indicates that Ash Grove may well be right; we could not be satisfied by these general descriptions that each of the forty-two documents is properly defined as “internal memoranda,” and that each falls within Exemption 5. The District Judge could not have reached any more definite and secure conclusion than we are able to on appeal, since he did not inspect in camera any of the forty-two documents. Had he verified the accuracy of at least a few of the agency’s descriptions, his acceptance at face value of the accuracy of the rest would have stood on more solid ground. In the absence of more specific document analysis by the agency, we think such a procedure was necessary to meet the requirement of Vaughn v. Rosen that judicial determinations under the FOIA be based upon a detailed record. Therefore, on remand we direct that the District Judge inspect at least a random sample of these forty-two documents sufficient to provide an objectively verifiable basis for deciding whether the agency descriptions are indeed conclusory or instead reasonably accurate and specific.
The fourth category of documents is described as the Commission’s “chronological minutes,” and is asserted by the Commission likewise to fall under Exemption 5 of the FOIA. In an affidavit, the Secretary of the Commission described these chronological minutes as
. accounts of the Commission’s executive meetings and conferences . the deliberations of the Commission such as exchange of opinions between individual Commissioners, their recommendations, motions, discussions and statements. They also contain staff recommendations and involve pending cases, internal reorganization procedures, personnel actions, policy determinations and generally reflect the Commission’s decision-making process.6
This description was relied on by the District Judge in his Second Memorandum Order of 22 February 19737 and Memorandum Opinion of 24 October 1973.8 Significantly, the District Judge thought that “[p]laintiff . . . apparently accepts the characterization of chronological minutes as set forth above, ."9
Ash Grove sharply disputes the Commission’s characterization of its chronological minutes, points to pleadings in the record in which it has done so, and asserts that it has described these minutes more accurately as
stenographic and other detailed recordings of transactions, voting decisions, binding opinions, policies, interpretations and other actions of the Commission or of individual Commissioners [relating to the actions taken by the Commission during its 1964-1967 Trade Regulation Rule Proceeding Concerning Vertical Integration in the Cement Industry].10
Ash Grove argues that these chronological minutes contain “secret law” and proof positive of its defense in the FTC proceeding that its fate is foreordained and its case has been prejudged by covert decisions of the Commission growing
5
157 U.S.App.D.C. 340, 484 F.2d 820 (1973), cert, denied,
415 U.S. 977, 94 S.Ct. 1564, 39 L.Ed.2d 873 (1974).
6
Joint Appendix II at 283 (emphasis supplied).