He entered the United States Military Academy at West Point, N.Y., 1 Sep 1877, where he graduated and was commissioned a 2nd Lieutenant, and assigned to the 5th Regiment, United States Cavalry, Troop F, in June, 1881.
5 July 1882 he married Catherine Dwight Ketcham, b. 29 July 1859.
He was promoted to 1st Lieutenant in 1889, and later to the rank of Captain.
From the "Boston Herald," (Boston, Massachusetts), 23 Dec 1917:
Maj. Lester W. Cornish, retired, who died recently at Pacific Grove, Cal., was born in this state in 1859 and was appointed to West Point from Massachusetts in 1877. He was retired from the army in 1907 for disability, receiving the rank of Major.
Catherine Dwight Ketchum Cornish
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