1801  (1933)  Collin & the men came back[;] the[y] brought 40 Bladders grease[,] a little pounded meat & the rest of their loads were made up with Bosses & Depouilles.
1887  The best parts, such as ribs, boss, and backfat, are dried and eaten that way.
1957  The back or boss and tongues were preserved as a great delicacy.