Seymour Thompson Clark was the oldest child and son of Ezra Thompson and Susan Leggett. He was born September 27, 1863 in Farmington. Seymour, was a beautiful, inquisitive, happy and energetic young boy between the age of two and three (1865 or 1866) when he adventured out one day to climb up the ladder of the workmen who were constructing a home next door. He tried to step off the ladder onto the second floor as he had seen the workmen do. His chubby legs could not stretch far enough and he plummeted to the ground suffering irreparable brain damage. He was living at home in the 1880 census and was fit and wit enough to work on the farm at 17. His mental capacity was effected and as he grew his mind became worse. He later became unmanageable for the family and was committed to the asylum in Provo in the fall of 1888 at age 25. In his thirty-first year he died at the asylum on 22 November 1893. A newspaper article reported he was an inmate at the asylum and had been ill for two month with of an abscess in the lung. Seeing a beautiful spirit extinguished through this accident must have been hard on Ezra and Susan.
Sources: 1981 ETC reunion bulletin, 1880 Census, State Hospital records