Coat of arms of Pierson

The blazon

ar. two chev. sa. on a canton of the last an eagle, displayed, of the first. — Crest, out of a ducal coronet or, an ostrich s head, betw. two ostrich-feathers ar. {Granted 1577. Borne hy Joseph Margetts Pierson, of Hit chin, Hertfordshire, Esq. 1824.] See Plate of Arras.

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.