Traded at 1 Bowman's Buildings, Aldersgate St. (1821-26), (residence) Islington (-1826), 2&4 Peterborough Ct., Fleet St. - adjoining rear of 138 (1843), all London, England. [residence with own observatory] Bramblehaw, Carshalton (1851-60). Partnership with William Troughton, Troughton & Simms (1826-1915). After 1860 partnership continued by son, James Simms