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When I was at Ticonderoga last Summer building Callies: I have the Honour to acquaint you that I invented a New model of Swivell Skids for Gun Carriages, which was handed to General Arnold for his Approbation, and was approv'd off, which General Gates and most of his officers can inform you off. And as I am Certain that the Invention will be of great use to the Publick, Shall be glad to hand it...
Date: 24 January 1777
Volume: Volume 7