Coat of arms of Sheil

The blazon

per fesse, gu. and ar. a pale counterchanged; on each of the last, a mullet sa. — Crest, out of a ducal coronet or, a triple plume of twelve ostrich s feathers, three, four, and five.

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.