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Isham maintains public inventories of the composers' and dealers' catalogues in its collections. 

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1. Sort the catalogues by company (for instance, Musikantiquariat Paul van Kuik all in one pile).
2. Sort those piles by number.
3. Update the list of dealers' catalogues with the numbers of the items you have in front of you.
4. File the items in the appropriate boxes in the Cage.

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1. Sort the catalogues by composer's last name.
2. Update the list of composers' catalogues with the names. You may need to look up authorized forms of names; use the Virtual International Authority File, http://viaf.org/, for this.
3. File the items in the appropriate boxes in the Cage.