Coat of arms of Chisholm

The blazon

gu. a boar s head. couped, or, langued az. — Crest, a man s hand, couped below the wrist, holding a dagger, erect, all ppr. the point transfixed through a boar s head, erased or, langued gu. [Borne by the Rev. Charles Chisholm, of Eastivell Rectory, near Ashford, Kent, 1827.]

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.