Coat of arms of Smythson

The blazon

ar. a chev. sa. charged with three fleurs-de-lis of the field, on a chief az. a lion, passant, guardant, or. — Crest, a hand and arm, embowed, habited ar. hand ppr. holding a battle-axe of the first, handle or. [Granted 1572.]

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.