They are shown to have done business with John & Thomas Clark Trowbridge from 1810 to 1824, see the WILTSHIRE ARCHAEOLOGICAL AND NATURAL HISTORY SOCIETY Records Branch VOLUME VI 1950
THE TROWBRIDGE WOOLLEN INDUSTRY AS ILLUSTRATED BY THE STOCK BOOKS OF JOHN AND THOMAS CLARK 1804-1824 EDITED BY R. P. BECKINSALE, D.Phil. DEVIZES 1951.