ClipArt ETC
"Argent, three billets azure, two over one. BILLETS. This charge is, by some authors, supposed to represent tiles or bricks; by others that it represents a letter or billet. The name and form of the charge most accords with the latter opinion." -Hall, 1862

Billets

"Argent, three billets azure, two over one. BILLETS. This charge is, by some authors, supposed to represent…

"The Billet is a right-angled figure a little longer than broad, resembling a folded letter in form, and from this said to have been derived."—Aveling, 1891

Billet Shield

"The Billet is a right-angled figure a little longer than broad, resembling a folded letter in form,…