Graduation photograph of a young man identified on the reverse as Marcus Strout, E. C. A., 1901. The institution was East Corinth Academy in Corinth, Maine.
The year appears to be 1901, but there's a crinkle in that corner of the photograph that makes the last digit of the year hard to decipher.
Even though Marcus, born in 1887, would have been a young graduate in 1901, that year makes more sense than 1907 or 1909. Marcus became a school teacher, so perhaps he was a good student who had skipped a grade or two.
From online research, hopefully correct: [corrections and additions welcome!]
Marcus Gilbert Strout (1887-1921) was born 11 January 1887 at Bradford, Maine, son of Albion and Olive (Speed) Strout, who were both Bradford, Maine, natives.
On 20 September 1916 at Waltham, Maine, Marcus married Vivian B. Kemp, daughter of William and Dora (Davis) Kemp, who were born in Stroud, England, and Aurora, Maine, respectively. Vivian was born at Aurora, Maine, on 29 April 1897.
The couple had a daughter Fern Stella Strout, born 30 August 1917. Fern would marry Woodrow W. Archer.
Sadly, Marcus Gilbert Strout died at Kingsbury Plantation, Maine, on 30 December 1921. I haven't yet found a death record for him or an explanation for his death. Kingsbury Plantation is located in Piscataquis County, along the remote part of Route 16 that connects Routes 15 and 201.
In 1925, Vivian married Aldis H. Williams, the widower of Ethel J. (Haslam) Williams. I found them in the 1930 Census of Bradford, Maine, and in the 1940 Census of Eastbrook, Maine. Maine. Vivian and Aldis had a daughter, Althea, born about 1930.
If you have corrections and/or information to share, please leave a comment for the benefit of other researchers.