Signed on page 3: John Daniel Hammerer.
Drop-head title.
The plan was published in January 1765. (See National Union Catalog).
"P. S. by the editor of this second impression. Soon after this plan was published (being in January 1765) a ship being taken up by order of the government, to convey back to America three Indians then here, leave was obtained from the Earl of Hillsborough ... for the author of this scheme to go over in the same ship with them to Virginia ... and he ... proceeded from thence over-land ... to the Cherokee country; where he was when the last letters received were wrote, being the 20th of September and 10th of October 1765 ... T. C. [that is, Thomas Crowley]"--Page 3.
Description based on online resource; title from PDF caption title (LLMC Digital, viewed July 23, 2019).