Born: July 30, 1842, Allegheny County, Pennsylvania.
Died: March 31, 1893, Washington, DC, of pneumonia.
Buried: Poland Riverside Cemetery, Poland, Ohio.
Maxwell was the son of a farmer, and husband of Mary E. D. Cornelius.
He started his career as a carpenter, then a building contractor. After having a leg amputated due to an accident, he entered the ministry.
He was educated at the Vermillion Institute, Hayesville, Ohio, then in 1871 graduated from Western Theological Seminary, Allegheny City, Pennsylvania (city was annexed by Pittsburgh in 1907).
He was ordained in the Pittsburgh Presbytery of the Presbyterian Church USA, and served at the Oakdale Presbyterian Church, Oakdale, Pennsylvania; the Presbyterian Church, Altoona, Pennsylvania (1876–85); in Pasadena, California (1885–90); Howard Church, San Francisco, California (1890–91); and at the Eastern Presbyterian Church, Washington, DC, until his death.
If you know where to get a good photo of Cornelius (head & shoulders, at least 200×300 pixels),