Coat of arms of Hammond

The blazon

ar. on a chev. sa. betw. three ogresses, each charged with a martlet of the field, as many escallops or, all within a bordure vert. — Crest, out of a ducal coronet or, a demi eagle, with wings expanded sa. charged, on the breast, with a rose gu. [Borne hy Sir Thomas Hammond, Knight of the Guelphic Order, and Chief Equerry to King George the Third.l

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.