Coat of arms of Baldock

The blazon

quarterly erminois and erm. an eagle displayed, with two heads sa. on a chief, engr. az. three escallops or. — Crest, on a wreath, upon a mount vert, a greyhound sejant, the dexter paw resting upon an escallop ar. [Borne by William Henry Baldock, Esq, of Petham, Kent, 1823.]

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.