These Memos were kept by Col. Hallock as a compilation of his own memos written from notes, and typed transcripts of meetings and phone conversations, as well as memos he received from other individuals. He kept a record of meetings, conferences, telephone calls, and other such events as "on record," for use in recalling events in his life, both personal and military. The vast majority of the memos are logs of his trips to Turkey, Iran, and Washington, D.C., among other places.