Robert Rogers to Benjamin Franklin, May 4, 1770

4th of May 1770

Sir

The following is an Estimate and account of the Peltry and Firr Trade in the District of Michilimakinac made from many Years carefull Observation whilst I commanded in that Country.

As I have another Copy desire you will make any Use of this that you think proper. I am Sir with the Greatest Respect Your most Obedient Humble Servant

Robert Rogers

To Doctr. Frankland