Benjamin Franklin to Cadwallader Colden, September 13, 1744

Philada. Sept. 13. 1744

Sir

Dr. Mitchel, 5 a Gentleman from Virginia, came to Town this Morning with Mr. Bertram, and we have been together all Day, 6 which has hindred my Writing to you as I intended. We are to go to Mr. Logan’s tomorrow, when I shall have an Opportunity of knowing his Sentiments of your Piece on Fluxions. 7 I am Sir Your most humble Servant

B Franklin