I'm coming back to this (fantastic) posting while writing a paper on copyright in libraries, and I'm struck by the fact that complete non-digitization and posting to the Internet, to be seen and copied by all, are seen as the only options. I would argue that a middle path is available - why not provide digital copies to be used within the Duke Libraries only? I'm thinking of the digital copies as "access" copies, so the original items might be spared some wear and tear...