Rock is a confectionery made and sold in many of the UK's seaside holiday resorts. As the character Ida says in Graham Greene's novel Brighton Rock[?], "It's like those sticks of rock: bite it all the way down, you'll still read Brighton."
... How Hill
Working Textile Museum[?], Derwent Valley Mills
Northumberland
Grace Darling Museum, Bamburgh
Northumberland Fusiliers Museum[?] in Alnwick ...