John was said to possess great personal beauty and the most brilliant mind of any of Capt. Stewart's children. From his letters we can judge that he was a boy of splendid promise. He died suddenly at the age of 18, in Manchester, Vermont (Private letters of The Stewart family of Middlebury, Vermont. Selected and edited by John E. Stewart, 1968. Sheldon Museum, Middlebury, Vt.) (Severance, B. Frank. Genealogy and biography of the descendants of Walter Stewart of Scotland and of John Stewart who came to America in 1718 and settled in Londonderry, N.H. Greenfield, Mass. : T. Morey & Son, 1905, pg. 81).