We have for years provided estimates of current value based on indexed valuation. In October we'll add probability of reappearance calculations. Our valuation estimates have proven useful. Adding reappearance calculations will frame bidding, negotiation and buying decisions in the years to come. This new service will be marked 'beta' for the its first year.
We are also adding free 'tracking' and a separate database of these expressions of interest. If an auction house or seller then posts a matching item at auction we will immediately email notice to each tracking account and include full details and a link to the seller. For those posting their interests a free AE account is required. Each member's list will be editable at anytime. Consider that if a rare item, identified by many as of interest, is posted. The chemistry should be very positive.
For AE's premium members the expressions of interest database will become an integral part of selecting and valuing material. Today 30% of all lots offered at auction fail to attract a satisfactory bid. If houses can see what is desired they will avoid the unwanted and pursue the desired. So too for dealers deciding both what to post and how to price. As soon as uploaded to Books for Sale emails will be sent. The dealer will not know who is looking but they will know that xx number of interested parties were informed. In time I believe both buyers and sellers will rely on this process. AE does not charge commission on sales.
As always change will be disruptive. Our continuing goal is to provide services that look at what's possible rather than what traditions dictate. We are mindful of what people expect but also seek to knit together elements and scale in innovative ways and today compete on the basis of imaginative approach. We are, in the final analysis, simply the sum of our ideas. The next generation of collector will have many alternatives. We who love books, manuscripts and ephemera are prepared to fight for a place at the table and this fall we'll warrant a careful hearing on the steps we take. Ultimately the decisions of collectors, institutions, dealers and auction houses to participate will determine the speed with which these ideas take hold. I ask for your support. We are, all of us in the field, fighting for the same outcome, the success of an extraordinary field.
Sotheby’s, Dec. 11: Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] Journal of the Proceedings of the Linnean Society, Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.
Sotheby’s, Dec. 11: J.K. Rowling. Harry Potter and the Philosopher's Stone, 1997, first edition, hardback issue, inscribed by the author pre-publication. £100,000 to £150,000.
Sotheby’s, Dec. 11: Wolfgang Amadeus Mozart. Autograph sketchleaf including a probable draft for the E flat Piano Quartet, K.493, 1786. £150,000 to £200,000.
Sotheby’s, Dec. 12: Hooke, Robert. Micrographia: or some Physiological Descriptions of Minute Bodies made by Magnifying Glasses. London: James Allestry for the Royal Society, 1667. $12,000 to $15,000.
Sotheby’s, Dec. 12: Chappuzeau, Samuel. The history of jewels, first edition in English. London: T.N. for Hobart Kemp, 1671. $12,000 to $18,000.
Sotheby’s, Dec. 12: Sowerby, James. Exotic Mineralogy, containing his most realistic mineral depictions, London: Benjamin Meredith, 1811, Arding and Merrett, 1817. $5,000 to $7,000.
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Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 156: Cornelis de Jode, Americae pars Borealis, double-page engraved map of North America, Antwerp, 1593.
Swann, Dec. 9: Lot 206: John and Alexander Walker, Map of the United States, London and Liverpool, 1827.
Swann, Dec. 9: Lot 223: Abraham Ortelius, Typus Orbis Terrarum, hand-colored double-page engraved world map, Antwerp, 1575.
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 233: Aaron Arrowsmith, Chart of the World, oversize engraved map on 8 sheets, London, 1790 (circa 1800).
Swann, Dec. 9: Lot 239: Fielding Lucas, A General Atlas, 81 engraved maps and diagrams, Baltimore, 1823.
Swann, Dec. 9: Lot 240: Anthony Finley, A New American Atlas, 15 maps engraved by james hamilton young on 14 double-page sheets, Philadelphia, 1826.
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 263: John Bachmann, Panorama of the Seat of War, portfolio of 4 double-page chromolithographed panoramic maps, New York, 1861.
Swann, Dec. 9: Lot 265: Sebastian Münster, Cosmographei, Basel: Sebastian Henricpetri, 1558.
Swann, Dec. 9: Lot 271: Abraham Ortelius, Epitome Theatri Orteliani, Antwerp: Johann Baptist Vrients, 1601.
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 283: Joris van Spilbergen, Speculum Orientalis Occidentalisque Indiae, Leiden: Nicolaus van Geelkercken for Jodocus Hondius, 1619.
Swann, Dec. 9: Lot 285: Levinus Hulsius, Achtzehender Theil der Newen Welt, 14 engraved folding maps, Frankfurt: Johann Frederick Weiss, 1623.
Swann, Dec. 9: Lot 341: John James Audubon, Carolina Parrot, Plate 26, London, 1827.
![<b>Sotheby’s, Dec. 11:</b> Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] <i>Journal of the Proceedings of the Linnean Society,</i> Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/00d5fd41-2542-4a80-b119-4886d4b9925f.png "<b>Sotheby’s, Dec. 11:</b> Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] <i>Journal of the Proceedings of the Linnean Society,</i> Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.")
