DCHP-1 Online
Hamburg bread Nfld 
See quote.
- 1906 "Hamburg bread," or hard biscuit (not to be confounded with pilot or sailor biscuit as popularly known, being thick and cake-like in shape and extraordinarily hard), is in constant use on the vessels and in the houses of the fishermen.
- 1917 [In the cookroom] the bill of fare consisted of pork and duff, Hamburg bread and butter, tea. . . .
- 1906 "Hamburg bread," or hard biscuit (not to be confounded with pilot or sailor biscuit as popularly known, being thick and cake-like in shape and extraordinarily hard), is in constant use on the vessels and in the houses of the fishermen.