Coat of arms of Blakeston

The blazon

ar. two bars gu. in chief three cocks of the last. — Crest, a cock or, collared, combed, and wattled, gu. B lakey, [Blakey, Lancashire, 1589,] gu. a chev. vair, betw. three cross crosslets, fitchee, or. — Crest, a dragon's head, couped, vert, ducallv gorged 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.