Coat of arms of Brocas

The blazon

sa. a lion, rampant, or. — Crest, a negro s head, in profile, ppr. couped at the shoulder, on the head an Eastern coronet or. [Borne by Barnard Brocas, Esq. of Wokefield-House, Mortimer, Buckinghamshire, 1824.]

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.