BENEDICT ARNOLD'S TREASON. REVOLUTIONARY WAR. THE GENTLEMAN'S MAGAZINE, AND HISTORICAL CHRONICLE. Lot of (2). November, 1780, 46pp and 1 plate and Supplement for the year 1780, 34 pp. and 1 plate London: Sylvan Urban, 1780. Octavo (8 3/8” X 5 3/8”) . From bound volume, remnants of leather along spine, F condition. Of great historical note is the November issue, which publishes the letter from Sir Henry Clinton, dated New York, Oct 12th, informing his Lord Geo. Germaine, that "Maj- Gen. Arnold has quitted the rebel service and joined the king's standard...but which terminated most fatally for Major Andre who had been taken prisoner...condemned to suffer death... which sentence was ordered by the rebel general Washington to be carried into execution…” In the supplement for the year, is a lengthy,7 page report of the "Proceedings on the Trial of Major Andre" ¨ with great detail. One section begins "Major Andre, Adjutant General to the British Army will be brought before your examination. He came within our lines in the night, on an interview with Major Gen. Arnold, and in an affirmed character, and was taken within our lines, in a disguised habit with a pass under a feigned name and with the enclosed papers concealed upon him.... (signed) G. Washington." Report continues for 6 more pages. Two key issues.