Coat of arms of Pocock

The blazon

chequy, ar. and gu. a lion, rampant, guardant, or. — Crest, on a wreath, an antelope s head ppr. attired or, issuing out of a naval coronet of the last. [Confirmed to Admiral Pocock, of St. Margaret's, Westminster, 1761.] [ 4u] C Another crest, an antelope s bead, erased, ar. attired or.)

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.