So Ulam wrote a memorandum on the subject in 1947 that is still classified. (discovermagazine.com)
Prepared written memorandums for over 10 Congressional hearings, interacting with Senators, Representatives, and Federal Judges. (resumemycareer.com)
The Foreign Office minister Sir Eyre Crowe also wrote a memorandum to the British cabinet claiming that «a solemn league and covenant» would just be «a treaty, like other treaties». (en.wikipedia.org)