Coat of arms of Drinkwater

The blazon

per pale, gu. and az. on a fesse, wavy, ar. betw. three garbs or, as many billets of the second. — Crest, three ears of wheat, two in saltier, and one in pale, or, enfiled with a ducal coronet of the last.

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.