Coat of arms of Mulcaster

The blazon

barry of ten, or and sa. a bend, erminois, a canton gu. — Crest, a lion, rampant, erminois, in the dexter fore paw a sword, erect, over the head a label with the motto fixed, the dexter hind foot resting upon a bomb, fibred, ppr. [Lome by Frederick William Mulcaster, Esq. of Barham, in the county of Kent, Colonel of Engineers, 1823.]

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.