1793-1860, active 1821-1826, optical & mathematical instrument maker, English; British

Traded at 1 Bowman's Buildings, Aldersgate St. (1821-26)

Rresidence- 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