took delivery on this one yesterday and have been working on deciphering the letter and researching.
Folded letter posted in Philadelphia on August 28 1818 to Newburgh N.Y. Nice red Philly CDS and script 18 1/2¢ which was the domestic rate for up to 150 miles, but not exceeding 400 miles.
What I've been able to find is the sender is Samuel F. Bradford, a Philadelphia printer and publisher, and member of a renowned Philadelphia printing family (there seemed to be LOTS of them). Among other things he is the publisher of the American edition of the Rees's Cyclopedia, a 39 volume fount of information which included beautiful colour plates.
http://www.cyclopaedia.org/1819/181...opaedia.htmlMr. Bradford appears to be writing to Mr. DeWitt regarding the latter's ability to distribute or sell the books, and encourages him that 'should (he) not wish to continue the work...would it not be advisable to sell you numbers to some persons that will.'
Ouch! Called to the carpet by the boss!



Haven't found much on Mr DeWitt. There was a John DeWitt in Newburgh who was well known as a surveyor who layed out many of the roads in town, but he died in 1808. I believe he had a son also named John (two in one internet listing!) so I think it may have been him - John Jr.
Research continues.
Also note the different inks and handwriting in the letter. I'm sure the body of the letter was written by Mr Bradford's secretary (the ink that has oxidized brown) while the boss made corrections and signed in a better quality ink, which is retained it's black colour for almost 200 years.