Also, I did some digging regarding this note by Eckstorm
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This nameless seasong was sent in April 9, 1928 by Mrs. Seth Thornton,of Southwest Harbor (ME) with the statement that she obtained it from

Mr. O. T. Mason of Medway, Mass. "an antiquarian and historian of the town. He has the orderly book from which they were copied." It belonging to John Boyd and was made at Fort Cumberland, Nova Scotia in 1759. Mrs. Thornton says she remembers hearing bits of it around Southwest Harbor in her childhood. It clearly is a fragment only.
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So, Mr. Orion T. Mason was indeed an "antiquarian" of Medway MA and wrote a history of the "The handbook of Medway history : a condensed history of the town of Medway, Massachusetts" in 1913.
https://archive.org/details/handbookofmedway02maso/page/20/mode/2up
On Page 20 it says
"1759 Seventeen Medway men in Fort Cumberland, Nova Scotia in Captain Adams' Company."

It seems our Last King was pressing and sending men from the New England colonies to serve in Nova Scotia.

Mrs Eckstorm may have John Boyd's name wrong because I only have found "James Boyden" in the muster rolls of the time. If this is he, he may have brought the orderly book back with him when he returned (which he did as records show his marriage and the birth of a son.) I have a message in to the Medway Historical Society asking if they might have the book indicated by Mr. Mason.

Thanks for all- julia