The York National Book Fair is an annual event and lays claim to being Britain's largest rare and antiquarian book fair with some 200 booksellers and an estimate of some 100,000 books on offer.
What, for instance, are the existing rare or antiquarian Indian books?
A year after his death, only the attention of antiquarian bookseller Donald McCormick saved Hay's notebooks and papers: he bought them at an auction for £3, the price of the old suitcase which contained them.
The York National Book Fair, which will be taking over the ground floor of the Barbican Centre on Friday and Saturday, is the largest rare, antiquarian and out-of-print book fair in Europe.
The Georgina Scott Sutherland Library has an important and valuable collection of antiquarian books mainly concerned with architecture but also including landscape architecture and art.
Ms Craddock has lately served a term as president of the world association of antiquarian booksellers - in my eyes a distinction higher than being an ambassador to the United Nations.
Music colleges have extensive collections of music in all genres, often receiving valuable bequests from former pupils, and many house valuable antiquarian collections.
They also have a special section for rare Canadiana, signed books, and antiquarian finds.
He sought out rare and out-of-print books from antiquarian booksellers, including a set of delightful eighteenth-century guidebooks by the York publisher Thomas Gent.
The Glasgow-based writer worked for many years as a dealer in second-hand, out-of-print and antiquarian books.