To Cadwallader Colden
als: Yale University Library
Philada. Augt. 27. 1747
Sir

This just serves to enclose you a Letter from our Friend Bertram; and to request you would deliver my Papers on Electricity to the Bearer Mr. Darling. I have not Time to add, but that I am, with great Respect, Sir, Your most humble Servant

B Franklin

p.s. I think you wrote me Word you had lent Watson’s Book on Electricity which I sent you last Winter to Dr. Bard. Please to direct Mr. Darling to Dr. Bard’s for it, if he has not return’d it to you.
Addressed: To  The honble. Cadwalr Colden Esqr  New York   per favr of Mr Darling
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