GENTLEMAN'S MAGAZINE SUPPLEMENT, London, For the Year 1780  Certainly the highlight of this issue is the nearly 7 pages taken up with the lengthy & very detailed proceedings headed: "Extracts of Letters from General Washington to the President of Congress". This concerns the trial of Major Andre in the treason affair with Benedict Arnold.
This is a terrific report with far more detail than we have found in any newspaper report of the period. Some of the items include: "...announcing the capture of a John Anderson who was endeavouring to go to New York with several interesting & important papers, all in the hand writing of Gen. Arnold; this was also accompanied with a letter from the prisoner, avowing himself to be Major John Andre, Adj. General to the British Army, relating the manner of his capture & endeavouring to shew that he did not come under the description of a spy...".
There is also a letter signed in type: G. Washington, concerning Andre's capture, plus a letter signed in type: John Andre, in which he espouses his innocence, as well as a letter signed in type by: B. Arnold in which he declares Andre should be set free as he was captured under a flag of truce.
There are several more letters signed by Washington, H. Clinton, B. Arnold & John Andre, the last by Andre includes his plea "...that I am not to die on a gibbet." followed by mention of his execution on October 2.
A terrific amount of detail on the Andre trial.
Included is the full page plate called for.
Complete in 36 pages, 5 by 8 inches, with a half page title/contents page at the front. Very nice condition.

A very nice "Supplement" issue published at the end of the year, & from the Revolutionary War with a wide range of varied content including war reports, news of the day, political reports, literary items, and other unusual tidbits.