Coat of arms of Lindon

The blazon

sa. a mural crown or, betw. three leopards heads ar. langued gu. — Crest, a sea dragon volant vert, gorged with a mural crown or, armed and langued gu. [ Granted to Roger Lindon, \th Feb. 1639,] Mayor of Carrick f'er gits, 1638, ( second Son of Robert Lindon, of Somersetshire. ) Lindon, . . , a chev. betw. three doves . . .

A blazon is the description of a coat of arms in the technical language of heraldry. The drawing comes from that text, and from nothing else.