Matt Barton, the library's curator of recorded sound, said the song was selected because of its impact on club music.

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"We won't ever know for sure who wrote it, " says Sue Hodson, curator of literary manuscripts at the Huntington Library.

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Greg Budney, audio curator at the Cornell Lab of Ornithology's Macaulay Library, a renowned collection of recorded bird song, says he has had requests to use the collection for medical purposes but hasn't heard of bird song being used to fight crime.

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McCabe is curator of manuscripts for the Archives and Special Collections division at the university's Alden Library in Athens, Ohio, where the Cornelius Ryan Collection is housed.

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Mark Purcell, the National Trust's libraries curator, said the book, which bears the signs of having been chained when it was in the abbey library, was a very rare survivor of its time.

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