Henry Larcom Abbot was born August 13, 1831 Beverly, Essex, Massachusetts, United States.
He attended West Point and graduated second in his class with a degree in military engineering in 1854. He was commissioned as a brevet second lieutenant in the U.S. Army on July 1, 1854, second lieutenant on October 2, 1855 and first lieutenant on July 1, 1857
In 1855, Abbot was assigned to work with Lieutenant Robert Williamson's Pacific Railroad Survey in California and Oregon. To honor his work on this survey, the California Geological Survey named Mount Abbot in the Sierra Nevada after him in 1873.
While serving in the Army, Abbot and Captain Andrew Humphreys conducted several scientific studies of the Mississippi River. They most notably studied the Mississippi river's flow starting at the Ohio River and going southward down to its base level at the Gulf of Mexico.
Abbot retired as a colonel on August 13, 1895. On April 23, 1904, he was appointed Brigadier General, U.S.A., retired.
Henry Larcom Abbot died on October 1, 1927 at Cambridge, Massachusetts. He was buried at Mount Auburn Cemetery, Cambridge.
"Massachusetts Marriages, 1695-1910, 1921-1924", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FHHF-BDV : 24 January 2020), Henry C. Abbott, 1856.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZFQ-5HY : 8 September 2017), Henry L Abbot, Whitestone, Queens, New York, United States; citing enumeration district ED 264, sheet 227B
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKLL-Z5J : accessed 11 January 2021), Henry L Abbot in household of Frederick V Abbot, Precinct 10, Washington, District of Columbia, United States; citing enumeration district (ED) ED 217, sheet 18A, family 377
https://www.findagrave.com/memorial/20305/henry-larcom-abbot
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Categories: Mount Auburn Cemetery, Cambridge, Massachusetts | United States Military Academy | Union Army Generals, United States Civil War | Notables