Coat of arms of Nicolson

The blazon

erm. on a pale sa. three martlets or, ( another, ar.) — Crest, on a mount vert, a leopard, sejant, ar. spotted sa. pierced through the breast with a lance ppr, the wound guttee de sang,

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.