It is a letter sent from New-England by Edward Winslow to his friend : "Brief and True Declaration of the Worth of that Plantation, and also certain useful directions for such as intend a voyage into New-England". We studied the text in order to introduce the lesson about Plymouth Colony.It sounds like something somebody made up - at least I've certainly never heard the expression and I wouldn't like to guess what a "bread-room" might be. Can you be a bit more specific about the text you found it in? Is it historical fiction, or an actual text written at some point in the past? If so, when? And in what context?
bread-room n. a room for keeping bread, esp. Naut[ical]. ‘a place parted off below the lower deck, close abaft, for keeping the bread’; also slang. = bread-basket n. 2.
1627 J. Smith Sea Gram. ii. 12 The Bread-roome is commonly vnder the Gun-roome.
1794 Ld. Hood in Ld. Nelson Disp. & Lett. (ed. 2) I. 483 (note), Put all you can get into your bread-room.