Coat of arms of Du Cane

The blazon

az. a chev. or, betw. three acorns, slipped, and erect. — Crest, a demi lion, rampant, sa., ducally crowned or, supporting, with the paws, an anchor, erect, gold. [Boime by Peter Du Cane, Esq. of Braxted Ix)dge, Essex, 1824.]

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.