Coat of arms of Blayds

The blazon

az. a chev. erm. in base a sword, ar. hilt and pomel or, on a chief of the third, two leopards heads of the fourth. — Crest, a demi leopard, salient, ppr. holding a sword, as in the arms. [ Granted June 6, 1761.]

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.