A recent inquiry from a dealer-appraiser raised a pertinent question; with significant changes in the world over the past year, have rare book, manuscript, and map appraisals issued in the mid-2019s ought/should they be revised?
There are two answers.
Valuation is generally determined on long term trends but when there are tectonic shifts and if auction prices hew high and low, should appraisals reflect short term reality?
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Charts and Analyses is a link to a series of year by year charts accessible while signed in as a paid member:
Using these charts it’s possible to examine 2019 month by month to compare the first 4 months [soon 5 months] of 2020 whether the market is holding firm.
And the answers are yes, yes, and not quite.
The pace of auction lots are holding, that said, the year over year norm has been that that number increases about 3.5% a year. So, because there is no current gain that’s a bit unusual.
The percentage of lots sold is also vital and it is a reasonable conjecture that the percentage of lots sold would be declining given the Covid crisis. This year the sell through rate has actually inched up from 80.4% in 2019 to 82.4% in 2020. This has been unexpected and frequently commented on in the Weekly Auction Updates.
And now for the not quite – and this may be meaningful. The median lot price is running soft. This is unsurprising because auction houses world-wide carefully manage low estimates to ensure success for all parties. So it’s logical that in this Covid period estimates are trending down. And said another way, when/if estimates begin to trend higher this will be a forward indicator that the auction market is believing the worst is behind us. Fingers crossed!
And a reminder that research members can also chart market expectations for any material in the Transaction Database. To do this run your search, select relevant records by marking them, then run the Get Current Estimate for a custom prepared report in 15 seconds.
Forum Auctions Fine Books, Manuscripts and Works on Paper 29th January 2026
Forum, Jan. 29: Plato. [Apanta ta tou Platonos. Omnia Platonis opera], 2 parts in 2 vol., editio princeps of Plato's works in the original Greek, Venice, House of Aldus, 1513. £8,000-12,000
Forum, Jan. 29: Book of Hours, Use of Rome, In Latin, illuminated manuscript on vellum, [Southern Netherlands (probably Bruges), c.1460]. £6,000-8,000
Forum, Jan. 29: Correspondence and documents by or addressed to the first four Viscounts Molesworth and members of their families, letters and manuscripts, 1690-1783. £10,000-15,000
Forum Auctions Fine Books, Manuscripts and Works on Paper 29th January 2026
Forum, Jan. 29: Shakespeare (William). The Dramatic Works, 9 vol., John and Josiah Boydell, 1802. £5,000-7,000
Forum, Jan. 29: Joyce (James). Ulysses, first edition, one of 750 copies on handmade paper, Paris, Shakespeare and Company, 1922 £8,000-12,000
Forum, Jan. 29: Powell (Anthony). [A Dance to the Music of Time], 12 vol., first editions, each with a signed presentation inscription from the author to Osbert Lancaster, 1951-75. £6,000-8,000
Forum Auctions Fine Books, Manuscripts and Works on Paper 29th January 2026
Forum, Jan. 29: Chaucer (Geoffrey). Troilus and Criseyde, one of 225 copies on handmade paper, wood-engravings by Eric Gill, Waltham St.Lawrence, 1927. £3,000-4,000
Forum, Jan. 29: Borges (Jorge Luis). Luna de Enfrente, first edition, one of 300 copies, presentation copy signed by the author to Leopoldo Marechal, Buenos Aires, Editorial Proa, 1925. £3,000-4,000
Forum, Jan. 29: Nolli (Giovanni Battista). Nuova Pianta di Roma, Rome, 1748. £6,000-8,000
Forum Auctions Fine Books, Manuscripts and Works on Paper 29th January 2026
Forum, Jan. 29: Roberts (David). The Holy Land, Syria, Idumea, Arabia, Egypt, & Nubia, 3 vol., first edition, 1842-49. £15,000-20,000
Forum, Jan. 29: Blacker (William). Catechism of Fly Making, Angling and Dyeing, Published by the author, 1843. £3,000-4,000
Forum, Jan. 29: Herschel (Sir John F. W.) Collection of 69 offprints, extracts and separate publications by Herschel, bound for his son, William James Herschel, 3 vol., [1813-50]. £15,000-20,000
Dominic Winter, Jan. 28: Lot 72. Edwards (George). A Natural History of Uncommon Birds… [and] Gleanings of Natural History, 7 volumes, 1st edition, 1743-64. £7,000-10,000
Dominic Winter, Jan. 28: Lot 87. Walcott (Charles D. et al.). Geologic Atlas of the United States, 227-volume set, U.S. Geological Survey, 1894-1945. £500-800
Dominic Winter, Jan. 28: Lot 236. A New Dictionary of the Terms Ancient and Modern of the Canting Crew…, By B. E. Gent., 1st edition, [1699]. £3,000-4,000
Dominic Winter, Jan. 28: Lot 245. Frost Fair Broadside. Upon the Frost in the Year 1739-40, Printed on the Ice upon the Thames at Queen-Hithe, 1739/40. £1,500-2,000
Dominic Winter, Jan. 28: Lot 270. Micheli (Antonino di). La Nuova Chitarra di Regole…, 1st edition, Palermo, 1680. £10,000-15,000
Dominic Winter, Jan. 28: Lot 280. Elgar (Edward). Concerto for Violin and Orchestra, [1910], signed presentation copy. £500-800
Dominic Winter, Jan. 28: Lot 286 - Walton (William, 1902-1983). Autograph manuscript full score for Belshazzar’s Feast, [1930-31]. £20,000-30,000
Dominic Winter, Jan. 28: Lot 304. Churchill (Winston). A terracotta maquette of Churchill by Oscar Nemon, c. 1955. £1,500-2,000
Dominic Winter, Jan. 28: Lot 364 - Russian Imperial Archaeological Commission. Mecheti Samarkanda..., Fascicule I Gour-Emir, St. Petersburg, 1905. £2,000-3,000
Sotheby’s Fine Manuscript and Printed Americana 27 January 2026
Sotheby’s, Jan. 27: An extraordinary pair of books from George Washington’s field library, marking the conjunction of Robert Rogers, George Washington, and Henry Knox. $1,200,000 to $1,800,000.
Sotheby’s, Jan. 27: An extraordinary letter marking the conjunction of George Washington, the Marquis de Lafayette, and Benjamin Franklin. $1,000,000 to $1,500,000.
Sotheby’s, Jan. 27: Virginia House of Delegates. The genesis of the Declaration of Independence and the Bill of Rights. $350,000 to $500,000.
Sotheby’s Fine Manuscript and Printed Americana 27 January 2026
Sotheby’s, Jan. 27: (Gettysburg). “Genl. Doubleday has taken charge of the battle”: Autograph witness to the first day of the Battle of Gettysburg, illustrated by fourteen maps and plans. $200,000 to $300,000.
Sotheby’s, Jan. 27: President Lincoln thanks a schoolboy on behalf of "all the children of the nation for his efforts to ensure "that this war shall be successful, and the Union be maintained and perpetuated." $200,000 to $300,000.
Sotheby’s, Jan. 27: [World War II]. An archive of maps and files documenting the allied campaign in Europe, from the early stages of planning for D-Day and Operation Overlord, to Germany’s surrender. $200,000 to $300,000.
![<b>Forum, Jan. 29:</b> Plato. [<i>Apanta ta tou Platonos. Omnia Platonis opera</i>], 2 parts in 2 vol., editio princeps of Plato's works in the original Greek, Venice, House of Aldus, 1513. £8,000-12,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/df7dd9ac-f0d0-4cb3-a44d-2731758530e4.png "<b>Forum, Jan. 29:</b> Plato. [<i>Apanta ta tou Platonos. Omnia Platonis opera</i>], 2 parts in 2 vol., editio princeps of Plato's works in the original Greek, Venice, House of Aldus, 1513. £8,000-12,000")
![<b>Forum, Jan. 29:</b> Book of Hours, Use of Rome, In Latin, illuminated manuscript on vellum, [Southern Netherlands (probably Bruges), c.1460]. £6,000-8,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/c40bad29-8cb5-4347-a0fd-5361d39e84a5.png "<b>Forum, Jan. 29:</b> Book of Hours, Use of Rome, In Latin, illuminated manuscript on vellum, [Southern Netherlands (probably Bruges), c.1460]. £6,000-8,000")
![<b>Forum, Jan. 29:</b> Powell (Anthony). [<i>A Dance to the Music of Time</i>], 12 vol., first editions, each with a signed presentation inscription from the author to Osbert Lancaster, 1951-75. £6,000-8,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/b7fdee12-4803-4d32-9330-a5729091cb92.png "<b>Forum, Jan. 29:</b> Powell (Anthony). [<i>A Dance to the Music of Time</i>], 12 vol., first editions, each with a signed presentation inscription from the author to Osbert Lancaster, 1951-75. £6,000-8,000")
![<b>Forum, Jan. 29:</b> Herschel (Sir John F. W.) Collection of 69 offprints, extracts and separate publications by Herschel, bound for his son, William James Herschel, 3 vol., [1813-50]. £15,000-20,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/a06cc0dd-7619-45e9-b155-5ad75ed7b2e5.png "<b>Forum, Jan. 29:</b> Herschel (Sir John F. W.) Collection of 69 offprints, extracts and separate publications by Herschel, bound for his son, William James Herschel, 3 vol., [1813-50]. £15,000-20,000")
![<b>Dominic Winter, Jan. 28:</b> Lot 72. Edwards (George). <i>A Natural History of Uncommon Birds…</i> [and] <i>Gleanings of Natural History,</i> 7 volumes, 1st edition, 1743-64. £7,000-10,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/7f9e9df2-b83a-40aa-a1b7-a535a02705d5.jpg "<b>Dominic Winter, Jan. 28:</b> Lot 72. Edwards (George). <i>A Natural History of Uncommon Birds…</i> [and] <i>Gleanings of Natural History,</i> 7 volumes, 1st edition, 1743-64. £7,000-10,000")
![<b>Dominic Winter, Jan. 28:</b> Lot 236. <i>A New Dictionary of the Terms Ancient and Modern of the Canting Crew…,</i> By B. E. Gent., 1st edition, [1699]. £3,000-4,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/1832c377-f148-4e66-ba22-33bef01d81a7.jpg "<b>Dominic Winter, Jan. 28:</b> Lot 236. <i>A New Dictionary of the Terms Ancient and Modern of the Canting Crew…,</i> By B. E. Gent., 1st edition, [1699]. £3,000-4,000")
![<b>Dominic Winter, Jan. 28:</b> Lot 280. Elgar (Edward). <i>Concerto for Violin and Orchestra,</i> [1910], signed presentation copy. £500-800](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/df958814-0689-4876-8b73-cfe5c0c6ad24.jpg "<b>Dominic Winter, Jan. 28:</b> Lot 280. Elgar (Edward). <i>Concerto for Violin and Orchestra,</i> [1910], signed presentation copy. £500-800")
![<b>Dominic Winter, Jan. 28:</b> Lot 286 - Walton (William, 1902-1983). Autograph manuscript full score for <i>Belshazzar’s Feast,</i> [1930-31]. £20,000-30,000](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/5ac2876b-2794-47d3-9df7-c4a002016bd6.jpg "<b>Dominic Winter, Jan. 28:</b> Lot 286 - Walton (William, 1902-1983). Autograph manuscript full score for <i>Belshazzar’s Feast,</i> [1930-31]. £20,000-30,000")
![<b>Sotheby’s, Jan. 27:</b> [World War II]. An archive of maps and files documenting the allied campaign in Europe, from the early stages of planning for D-Day and Operation Overlord, to Germany’s surrender. $200,000 to $300,000.](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/9d2762bc-9f26-47ef-96de-1c28070e19f6.png "<b>Sotheby’s, Jan. 27:</b> [World War II]. An archive of maps and files documenting the allied campaign in Europe, from the early stages of planning for D-Day and Operation Overlord, to Germany’s surrender. $200,000 to $300,000.")