How an 800-Year-Old Library Preserves Its Books from Mold and Bugs
- by Michael Stillman
Old books being aired out (from NHK World video)
Old books are being preserved at Japan's oldest school and perhaps oldest library in a manner I had not seen before. The founding dates of the school and library are unknown, but it is believed that the library dates to the 12th century, the school earlier. Currently, it holds 17,000 volumes, including some that are very old. Presumably, they have some experience with preserving books though I don't know how long this practice has been used.
The Ashikaga Gakko (school), north of Tokyo, airs out their books once a year. This is to protect them from mold and bugs. They take a group of books from the library, in this particular group 53, and lay them out on the floor of an adjoining room. Staff members don face masks and gloves. They then proceed to open the pages, one-by-one, to expose them to dry air. If it is a rainy day, they take a pass. They also check out the bindings for any damage. The process goes on through October and November until all the old and valuable books have been aired out.
Do any libraries in America do this? Some collectors apparently air out their books on occasion but I don't know if this is done by any with seriously valuable books. The major libraries are climate controlled and presumably this is sufficient to discourage mold and bugs. Airing out may be a low-tech way for a library without the funds to provide advanced climate controls.
One obvious downside of this method is that the books are being opened and the pages turned once a year. The reality is every time a book is opened and the pages turned, it suffers some damage, even if miniscule and unnoticeable. Add that up for a few decades, even centuries, and the book is unlikely to be quite the same. This is why major libraries consider their most valuable volumes untouchable. Maybe once in awhile they will open one to a page and put it in a display case, but don't expect to get any closer.
Still, if you have books of medium value, but don't have perfect climatic conditions in your house, this might be a good idea. But, I'm not an expert on this, so here is some advice from the people who have to know – the Library of Congress.
Forum Auctions Online: India Ends 19th February 2026
Forum, Feb. 19: Lot 40 Ramasvami (Kavali Venkata). A Digest of the Different Castes of India, 83 charming hand-coloured lithographed plates, Madras, 1837. £5,000-7,000
Forum, Feb. 19: Lot 50 Watson (John Forbes) & John William Kaye. The People of India: A Series of Photographic Illustrations...of the Races and Tribes of Hindustan, 8 vol., 480 mounted albumen prints, 1868-75. £4,000-6,000
Forum, Feb. 19: Lot 53 Afghanistan.- Elphinstone (Hon. Mountstuart). An Account of the Kingdom of Caubul, first edition, hand-coloured aquatint plates, a fine copy, 1815. £2,000-3,000
Forum, Feb. 19: Lot 57 [Album and Treatise on Hinduism], manuscript treatise on Hinduism in French, 31 watercolours of Hindu deities, Pondicherry, 1865. £3,000-4,000
Forum, Feb. 19: Lot 62 Allan (Capt. Alexander). Views in the Mysore Country,
[1794]. £2,000-3,000
Forum Auctions Online: India Ends 19th February 2026
Forum, Feb. 19: Lot 76 Bird (James). Historical Researches on the Origin and Principles of the Bauddha and Jaina Religions..., first edition, lithographed plates, Bombay, American Mission Press, 1847. £3,000-4,000
Forum, Feb. 19: Lot 100 Ceylon.- Daniell (Samuel). A Picturesque Illustration of the scenery, animals, and native inhabitants, of the Island of Ceylon: in twelve plates, 1808. £5,000-7,000
Forum, Feb. 19: Lot 123 D'Oyly (Charles). Behar Amateur Lithographic Scrap Book, lithographed throughout with title and 55 plates mounted on 43 paper leaves, [Patna], [1828]. £3,000-5,000
Forum, Feb. 19: Lot 139 Gandhi (known as Mahatma Gandhi,) Fine Autograph Letter signed to Jawaharlal Nehru, Sevagram, Wardha, 1942, emphasising the importance of education in rural communities. £10,000-15,000
Forum Auctions Online: India Ends 19th February 2026
Forum, Feb. 19: Lot 140 Gantz (John). Indian Microcosm, first edition, Madras, John Gantz & Son, 1827. £10,000-15,000
Forum, Feb. 19: Lot 146 Grierson (Sir George Abraham). Linguistic Survey of India, 11 vol. in 20, folding maps, original cloth, Calcutta, Superintendent Government Printing, 1903-28. £2,000-3,000
Forum, Feb. 19: Lot 195 Madras.- Fort St. George Gazette (The), No.276-331, pp.493-936 and Index to all of 1834 at end, modern half calf, Madras, 2nd July - 31st December 1834. £2,000-3,000
Forum, Feb. 19: Lot 205 Marshall (Sir John) and Alfred Foucher. The Monuments of Sanchi, 3 vol., first edition, 141 plates, most photogravure, [Calcutta], [1940]. £3,000-4,000
Il Ponte, Feb. 25-26: HAMILTON, Sir William (1730-1803) - Campi Phlegraei. Napoli: [Pietro Fabris], 1776, 1779. € 30.000 - 50.000
Il Ponte, Feb. 25-26: [MORTIER] - BLAEU, Joannes (1596-1673) - Het Nieuw Stede Boek van Italie. Amsterdam: Pieter Mortier, 1704-1705. € 15.000 - 25.000
Il Ponte, Feb. 25-26: TULLIO D'ALBISOLA (1899-1971) - Bruno MUNARI (1907-1998) - L'Anguria lirica (lungo poema passionale). Roma e Savona: Edizioni Futuriste di Poesia, senza data [ma 1933?]. € 20.000 - 30.000
Il Ponte, Feb. 25-26: IL MANOSCRITTO RITROVATO DI IPPOLITA MARIA SFORZA. TITO LIVIO - Ab Urbe Condita. Prima Decade. Manoscritto miniato su pergamena, metà XV secolo. € 280.000 - 350.000
Sotheby's Fine Books & Manuscripts Available for Immediate Purchase
Sotheby’s: Balthus, Emily Brontë. Wuthering Heights, New York: The Limited Editions Club, 1993. 6,600 USD.
Sotheby’s: Charles Dickens. Complete Works, Philadelphia & London: J.B. Lippincott Company & Chapman & Hall, LD, 1850. Limited Edition set of 30 volumes. 7,500 USD.
Sotheby’s: John Lennon, Yoko Ono. Handwritten Letter from John Lennon and Yoko Ono to their Chauffer. 1971. 32,500 USD.
Sotheby’s: Winston Churchill. First edition of War Speeches, Cassell and Company, Ltd., 1941. Set of 7 volumes. 5,500 USD.
Sotheby’s: Andy Warhol, Julia Warhola. Holy Cats First Edition, Signed by Andy Warhol. 1954. 30,000 USD.