Ambrose P. Kelsey served both as principal for Plymouth Normal School and professor of natural history. was educated at Hamilton College and Bowdon College and served as the first principal of Cincinnatus (N.Y.) Academy in 1857 and professor at the New York state normal school in Albany in 1859. He went on to Farmington (Maine) Academy and was influential in establishing Farmington Normal School, the first public institution of higher education in the State of Maine, where he was the first president. He served as principal of Plymouth Normal School from 1876-1879, then moved on to Hamilton College (New York) where he was professor of natural history.
from One Hundred Years of Service: Plymouth State College 1871-1971. Norton R. Bagley; and advancement publications