Benjamin Franklin to Jan Ingenhousz, June 1, 1783

Passy, June 1. 1783—

Dear Sir,

This will be delivered to you by an ingenious young Friend of mine, Mr. S. Vaughan, who
travels with a View of improving himself in Mineralogy. 4 He will be much oblig’d by the Informations
& Counsels that you can give him; and as I have a great Regard for him, and for his
Family, I earnestly recommend him to those Civilities which you are accustomed to show
to Strangers of Merit. With sincere Esteem I am, my dear Friend, Yours most
affectionately

B Franklin

Dr Ingenhauss.