Coat of arms of Gildart

The blazon

vert, a lion, rampant, reguardant, crowned or, betw. three arrows of the last. — Crest, a demi lion, rampant, reguardant, or, crowned of the last, holding in his dexter paw an oak-branch ppr. [Granted December 20, 1759.]

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.