The (mathematical) headline today is that Turing’s papers have been saved for the British nation. I was puzzled when the papers first came up for sale in November 2010, because upon a bit of investigation it turned out that what was being sold were **offprints**. I realize that Turing is personally more interesting than most mathematicians, and that there’s been a vast expansion of the “collectables” market, but are people really collecting offprints of mathematical papers now?

Apparently, yes, and they have been for a while. *The Scientist* wrote about offprints and other scientific collectables in 1996. An offprint of Claude Shannon’s “A Mathematical Theory of Communication” was auctioned at Christie’s NY in 2005 for $9000.

So, if tastes ever turn to **interwar algebraic geometry**, I’m sitting on a gold mine.

When I came to Cambridge in 1999, I was put into Tim Gowers’ old office (this was when we were still in the converted CUP warehouse in Mill Lane). Tim apologized for the lack of storage space. The cupboards were full of **J.A. Todd**‘s offprint collection, and he hadn’t had the heart to throw it away.

The collection was an impressive sight — organized alphabetically in special document boxes in elegant, faded colors. I didn’t have any particular need for storage, so I left it alone. When, a year later, I had to pack up to move to the CMS, I found that I too couldn’t bear to throw it out. So I duly packed the collection for carriage to Pavilion B of the CMS, and then packed it again when I moved to the geometry pod (Pavilion E). It’s now arrayed across many feet of shelf space in my office.

I can’t say that I use it. Several years ago, out of curiosity about my predecessors in Cambridge geometry, I extracted a paper by Du Val and I could not make heads or tails of it. It was an astounding reminder of what a difference Weil and Serre and Grothendieck made to algebraic geometry. Igor Dolgachev is only person I know who really understands the old language.