A remarkable 18th century chess manuscript, one that is of no little significance when considering the emergence of modern chess and its gradual codification. It provides a window into the social and intellectual world of the nascent London Chess Club and contains an early and detailed analysis of the main lines of the Bishop's Gambit opening, drawing on multiple sources. The manuscript is written in a very unusual form of shorthand to record the games that is neither algebraic nor descriptive. An article featuring the manuscript as well as providing a descriptive key to the shorthand employed within it appeared in British Chess Magazine (vol.142, Dec. 2022, pp.708-714) and is available on request. Provenance: Richard Penn (1735-1811, bookplate), lieutenant governor of the Province of Pennsylvania from 1771 to 1773 and later a member of the British Parliament. His son Richard Penn, FRS (1784-1863), published a volume (1833) that included Maxims and Hints for a Chess Player; James Wilson Rimington Wilson (1822-1877, ink inscription), noted chess-player and collector of playing-cards, his library sold at Sotheby's in 1928.