The Shorter Oxford English Dictionary (on historical principles): two volumes
Victorian Pharmacy: book of the BBC series
What Jane Austen Ate and What Charles Dickens Knew: I've been wanting a copy for ages.
After all that, three cheap romances (all by authors I was looking for) and a Bryan Ferry CD (I'm working on Searching for Julia again: I need more Bryan Ferry) just filled the gaps in the bag nicely.
I also picked up a DVD of files retrieved from a very old PC that hadn't worked in a couple of years, and then discovered that Dad has maps that will fill in some of the gaps in my knowledge (although not all of them).