Thousands of items are available to buy from dealers online. Here we pick out one that caught our eye this week.
A rare poster by Edward Bawden (1903-89) advertising the London Underground and the British Empire Exhibition of 1924 is available on The Map House website for £6500.
The pictorial map was Bawden’s first commission, completed while still a student at the Royal Academy of Arts. He worked with the more experienced Thomas Derrick (1885-1954), who drew the outline structure of the map, with the younger artist filling in illustrations and calligraphy.