To Alexander Spotswood, 16 Aug. 1808
This will be handed you either by Mr Dupont or Mr Banduy, who are manufacturers of gunpowder on Brandywine. The object of the visit which one or the other of those gentlemen purpose making to your part of the Country is to procure a supply of Saltpetre for their works, and understanding that you make considerable quantities of this article they will certainly call upon you.