Coat of arms of Bigg

The blazon

ar. on a fesse betw. three martlets sa. as many annulets or. — Crest, an arm embowed, vested . , . . , couped at the shoulder and holding a serpent, the tail twisted round the arm.

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.