# The Dealer as Maker of Taste, and the Ledgers He Left > Duveen sold certainty and Berenson took a percentage of it. The stock books those firms left behind are now better provenance evidence than anything the dealers ever told their clients. > The Study - 2026-08-02 > Canonical HTML: https://iconotheca.com/study/dealer-stockbooks-as-provenance-evidence/ ## Key points - Joseph Duveen sold Gainsborough's Blue Boy to Henry and Arabella Huntington in 1921 for 728,800 US dollars, then the highest price ever paid for a painting, after staging exhibitions in London and New York. - The Getty Research Institute acquired the M. Knoedler and Co. archive in 2012 and has published more than 40,000 records transcribed from eleven painting stock books. - A Knoedler sales book entry of January 1931 records the commission charged on two of the twenty-one Hermitage paintings Andrew Mellon bought for 6,654,000 US dollars. - The same firm closed in 2011 after selling around 60 million dollars of forgeries supported by an invented ownership narrative built first on Alfonso Ossorio and then on David Herbert. ## The dealer did not sell the picture, he sold the certainty ## The connoisseur was on the payroll, and the terms are the point ## The ledgers outlived the firms and became the evidence ## A stock book settles what a catalogue entry cannot ## Knoedler also proves the opposite, which is why the distinction matters The dealers who moved European pictures into American collections did not merely intermediate the market, they defined it, and the persuasive machinery they built was designed to be believed rather than checked. The durable thing they left is the part nobody was meant to read. Duveen's invoice books, Knoedler's commission entries and the Wildenstein stock books now underwrite provenance claims their authors would not have expected to be tested, and the same firm that supplies a January 1931 line proving how a Hermitage Botticelli reached Washington also supplies the case that killed narrative provenance for good. Trust the ledger, not the letter. ## Questions **Where are the Duveen, Knoedler and Wildenstein records held?** The Getty Research Institute holds the Duveen Brothers records, 1876 to 1981, and acquired the M. Knoedler and Co. archive, approximately 1848 to 1971, in 2012. The Wildenstein archives went to the Wildenstein Plattner Institute, formed in 2016 by the Wildenstein family and the Hasso Plattner Stiftung, which received them in 2017 and launched its digital archives on 23 October 2020. **How much of the Knoedler material can be searched online?** The Getty's published dataset now exceeds 40,000 records transcribed from the eleven painting stock books and enhanced from the twenty-one New York paintings and watercolours sales books covering 1872 to 1970. The first release put close to 24,000 records from stock books one to six, 1872 to 1920, online, and the transcriptions are also distributed as open data. **Should a Berenson attribution made during the Duveen years be discounted?** It should be labelled, not discounted. From 1907 Berenson had a financial interest in pictures Duveen bought on his advice, reportedly a quarter of the profit, and both parties kept the arrangement secret so that clients would read his opinion as independent. Treat such an attribution as an interested opinion that requires corroboration, and note that the harshest characterisations of his conduct derive from Colin Simpson's contested 1986 account. ## Sources - [1] The Huntington, 'Project Blue Boy: History'. - [2] Getty Research Institute, 'Duveen Brothers records, 1876-1981 (bulk 1909-1964)'. - [3] Online Archive of California, finding aid, 'M. Knoedler & Co. records, approximately 1848-1971'. - [4] Getty News, 'Database of Knoedler Gallery Stock Books Now Online'. - [5] Getty, provenance-index-csv, Knoedler dataset (open data). - [6] Getty News, 'Knoedler, Mellon, and an Unlikely Sale', republished by the Central Registry of Information on Looted Cultural Property 1933-1945. - [7] Wildenstein Plattner Institute, 'Digital Archives & Library' and 'Now Live: Explore the WPI Digital Archives'. - [8] The Art Newspaper, 'Knoedler fakes trial could be a game-changer for the art market', 25 January 2016. - [9] ARTnews, 'The Big Fake: Behind the Scenes of Knoedler Gallery's Downfall', on the Ossorio and David Herbert provenance narratives. - [10] The Art Story, 'Bernard Berenson', on the 1907 agreement with Duveen. Secondary summary drawing on Colin Simpson's contested 'Artful Partners' (1986); the Duveen accounts at the Getty are the primary record. - [11] Wikipedia, 'Soviet sale of Hermitage paintings'. Tertiary source for the Mellon total and the Raphael and van Eyck figures; replace with the National Gallery of Art curatorial files.