Purity Hard Bread, also knows as Hard Tack, has been a dietary staple of Newfoundland for many years. Hard bread was developed from the ancient sea biscuit which formed the basis of meals on fishing vessels and cargo ships prior to the 1840's when baking onboard was impossible.
Due to its long life, hard bread was an ideal substitute for fresh bread. As one tale goes, a cook on a schooner was preparing a meal of hard bread and fish for the crew and was asked break-up the bread, or "bruise" the bread prior to it being soaked. This the term "Brewis" of Fish & Brewis!