sentences:  He attended the common schools, studied law, was admitted to the bar and practiced.Markell was elected as an Adams man to the 19th and 20th United States Congresses, holding office from March 4, 1825, to March 3, 1829.At the time of his death, he practiced at Oppenheim, and was buried at the cemetery in the area which in 1838 was separated from Oppenheim as the Town of St. Johnsville.