Coat of arms of Mortlake

The blazon

gu. a lion, rampant, within a bordure, indented, or. — Crest, a lion, sejant, or, holding in the dexter paw a cross pattee, fitch e, az. on it a scroll, with this motto — Hie labor, and resting the sinister paw upon a cone ar. and on that another scroll, with the motto — Hoc opus.

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.