Education
He attended the country schools and was graduated from the scientific department of Abingdon College (which was later consolidated with Eureka College).
He attended the country schools and was graduated from the scientific department of Abingdon College (which was later consolidated with Eureka College).
He engaged in literary pursuits until his death in Sheridan in 1912. Interment was in Sheridan Cemetery.
He engaged in teaching and was a member of the faculty of Hiram College in Ohio. He moved to Sheridan, Wyoming in 1884. He was a delegate from Wyoming to the World"s Fair Congress of Bankers and Financiers at Chicago in June 1893 and was a member of the constitutional convention that framed the constitution of the new State of Wyoming in 1889.
Coffeen was elected as a member of the Democratic party to the Fifty-third Congress, serving from March 4, 1893 to March 3, 1895.
He was an unsuccessful candidate for reelection in 1894 to the Fifty-fourth Congress.