Derby is a British cheese from Derbyshire. Derby has a natural rind, firm paste, mild flavour and comes in cartwheel-shaped cheeses weighing 14 kg (35 lb). Derby is used as a toasting cheese, and is flavoured with fresh sage leaves, giving it green streaks to the cheese - this is Sage Derby.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.