Lorenzo Sabine (February 28, 1803 – April 14, 1877) was a U.S. Representative from Massachusetts now more remembered for his research and publishing concerning the Loyalists of the American Revolution than as a public servant.
His paternal grandfather was a "Patriot" who fought in the New Jersey campaign of 1777.

Youth

Lorenzo and family followed the itinerant father of the family in his various circuits through NH, CT, ME, and Boston, MA. The family was in Maine for the war of 1812 where his father suffered imprisonment.

Once his father died and his mother remarried and started a second family, Lorenzo left for Eastport, Maine, c. age 18.

Early in life he served for 2 years in the Maine Legislature representing Eastport ME which is next to the border w/Canada. As such, a good number of the Loyalist families he profiled were ones he knew personally.
see: https://en.wikipedia.org/wiki/Lorenzo_Sabine

~• his 600 page Biographical Sketches of Loyalists of the American Revolution, with an Historical Essay ††. 2 volumes. Boston, MA: Little, Brown and Company, 1864 ; published in an earlier edition as well: The American Loyalists, or Biographical Sketches of Adherents to the British Crown in The War of the Revolution; Alphabetically Arranged; with a Preliminary Historical Essay†. Boston, MA: Charles C. Little and James Brown, 1847. vi, 733 pp. (groundbreaking work)

see also: (His obituary)
The Boston Globe
16 Apr 1877, Mon · Page 5
https://www.newspapers.com/image/428218116/?terms=%22lorenzo%20sabi...

Comment:

When The American Loyalists, or Biographical Sketches of Adherents to the British Crown in The War of the Revolution; Alphabetically Arranged; with a Preliminary Historical Essay† was published in 1847, Lorenzo's daughter Matilda was already married to the Canadian steam ship captain John H. McLarren of Yarmouth County, NS. In reading Sabine's analysis, we might be led to wonder how much family ties such as this influenced the analysis of the aftermath of the War. See in particular, pages surrounding 86-87 in the text.

~• in terms of another direct experience with a Rev. War figure, Lorenzo had, for a kind of step-grandfather, Gen John Crosby who was local to <Sabine> family of Maine and, incidentally, was also just as politically inclined as Lorenzo.

Also: Lorenzo's paternal grandfather was Corporal Nehemiah Sabin who barely survived his enlistment and died shortly thereafter.

It may have been the relationship to his step-father that contributed to Lorenzo's venturing into banking: vis.
"In 1806 Mr. Crosby was named the president of the First Bank in Bucksport. It was the only bank east of Wiscasset, but due to the carelessness of a cashier, Crosby suffered much financial loss through his position at the bank. In addition to being head of the bank, he was a Senate candidate several times, but was never elected because the Democratic-Republicans were in the majority in the area and Crosby himself was a Federalist. General Crosby worked hard to have the county seat changed from Castine to Hampden, but he proved unsuccessful in that venture as well."

Lorenzo Sabine fascination with both the Revolution and the War of 1812 was not merely academic. His paternal grandfather is said to have been wounded at Trenton NJ c. 1776-1777. During the War of 1812, his own father was held prisoner by the British in and was only released after an impassioned appeal by his mother Harriet. Lorenzo was then eleven years old.

Taken together, these family events must have had quite and influence on young Lorenzo.

Ashburton Treaty: "appointed in 1852 as a secret and confidential agent of the United States treasury department, with reference to the operation of the Ashburton treaty as connected with our commerce with British colonies

Works

He contributed to the "North American Review" and "Christian Examiner," and was the author of the life of Commander Edward Preble (1847) in Sparks's "American Biography"; "The American Loyalists, or Biographical Sketches of Adherents to the British Crown in the War of the Revolution" (Boston, 1847; 2d ed., 2 vols., 1864); "Report on the Principal Fisheries of the American Seas," prepared for the United States treasury department (Washington. 1853) ; "Notes on Duels and Duelling, with a Preliminary Historical Essay" (Boston, 1855; 2d ed., 1856); and an address before the New England historic-genealogical society, 13 Sept 1859 on the "Hundredth Anniversary of the Death of Major-General James Wolfe.

Additional Research

The situation with the parentage of Lorenzo's supposed daughter Matilda Green McLarren is not entirely resolved.

• Matilda was born July 11, 1827, several years before Lorenzo married a still very young Abbie Deering. This suggests that Abbie was not Matilda's mother.
• An assignment of Elizabeth Milk Deering as Matilda's mother is only anecdotal.