1To Benjamin Franklin from François Willem de Monchy, 9 January 1767 (Franklin Papers)
ALS : American Philosophical Society I have spoken here with a man to make you a model of an Iceboat, but as it must be made in the proportion of an Inche, or perhaps less to a foot it will cost you about 10 Duc., that is between 4 and 5 guineas, and this is the reason why I ask you first if you will give so much for it, if you like it, I’ll take care it shall be made soon, and send it over...