Brother Librarian groaned as yet another lead-sealed cask was rolled out of storage for unsealing. Armbruster was not impressed by the fact that the secular scholar, in two days, had unraveled a bit of a puzzle that had been lying around, a complete enigma, for a dozen centuries. To the custodian of the Memorabilia, each Unsealing represented another decrease in the probable lifetime of the contents of the cask, and he made no attempt to conceal his disapproval of the entire proceeding. To Brother Librarian, whose task in life was the preservation of books, the principal reason for the existence of books was that they might be preserved perpetually. Usage was secondary, and to be avoided if it threatened longevity.