I have always enjoyed trawling auction catalogues for medieval manuscripts. Sometimes an entire catalogue is dedicated to medieval manuscripts, but more commonly a few medieval items are are listed together with later manuscripts, and/or printed books; sometimes there is only a single medieval leaf or cutting among hundreds of other items. The same applies to medieval manuscripts in the catalogues of rare book dealers; there are very few dealers in any generation who devote entire catalogues to medieval manuscripts.
When you find a medieval item in a catalogue that is mostly filled with other things, one of two situations typically applies. The most common situation is that the item is something very uninteresting, such as a leaf from a mediocre Book of Hours or choirbook. In a tiny minority of cases, however, you can find somethign much more interesting, and because it is hidden among lots of non-medieval material, it is likely to have been overlooked by most other medievalists. It is these discoveries that makes the hours of fruitless page-turning worthwhile.
It was only relatively late -- about four or five years ago -- that I realised how often medieval illuminated leaves and cuttings can also be found in auction and dealer catalogues of Old Master Drawings -- a type of catalogue that I had previously ignored. This post provides a few examples.
