I agree, Orford, NH. Thanks for sharing.
Also,
Quote:
Contents of letter don't give a clue as to addressee
I'll bet the contents do. Just like comparing the "r" formations already. Specifically, if written by the same person who addressed the letter the contents will contain multiple examples of how the writer formed certain letters when at the beginning, middle, and end of words.
As an example to look for. It is very common in old letters for the final "d" to have a stroke looping back up over itself. The writer will probably write words like "and" with that same looped "d" as he writes "Orford" on the outside. Not a typo. Here is a small portion of a letter written in 1810, including the double ss "Congrefs" near the end!

Additionally, what is the origin postmark town at the upper left?