Dear Sir
I have just time to thank you for yr favor; & to beg yr corrections of my map as soon as convenient. as to Col. Roys I would by no means have anything taken from his by stealth as it is a private property & even unpublished.1 It would be dishonorable to think of it. My outline is from Dorret; but the islands are often mended. The orkneys from Mackenzie.
I am Dr Sir
your faithful humble
Servt
Downing Aug. 27th 1776.