It goes without saying that in order to trace the provenance of a manuscript (whether it be a codex, leaf, or cutting) from an auction to its subsequent owners, you need to identify who bought it at the auction. First, you usually need to find an annotated copy of the catalogue; then you need to be able to read the name of the buyer. If you are lucky, it will be a well-known and very distictive name, such as the dealers Quaritch, Dobell, or Colnaghi; or a collector like Cockerell, Riches, or Korner, each of whom is fairly easy to pursue further. Sometimes the name is only semi-legible or it is very common (Smith, Jones, etc.). Sometimes it is legible and reasonably uncommon, but unfamiliar; in this post I'll consider one such example.