As it turned out, there was only one day when Oxford libraries reopened after the Christmas and New Year break, before they had to close again due to new Covid restrictions. Fortunately, I had booked a slot on that day, and was therefore able to work through a list of things that I wanted to check. One of these was Charles Seymour's 1970 catalogue of Yale Art Gallery's early Italian paintings, which I had been unable to consult when writing this blog post.
For the sake of completeness, it seems worth providing a full list of the Lehman illuminations now at Yale, whose Hachette provenance has been unknown since 1954. I can now tabulate the Yale items with their respective numbers in the catalogues by Seymour , Pia Palladino , and the 1953 Hachette auction .