Coat of arms of Malcom

The blazon

or, a saltier gu. betw. four stags heads, erased, of the last. — Crest, a demi swan, rising, ar. Male, — Crest, on a marquess s coronet, a comish chough with wings expanded, ppr.

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.