Saw this mentioned on the Classicists list … here’s a bit from the intro page:
This page offers online access to 154 digitized notebooks used by Sir John Beazley, mainly in the earlier part of his career, between around 1910 and 1930, as he travelled around the world’s collections of Attic vases. Also included is a notebook of Nicolas Plaoutine, documenting nineteenth-century sales of vases. The Beazley Notebooks Project has been made possible by the generosity of donors.
It’s very interesting how ‘sparse’ (for want of a better term) the notebooks actually are …