In September 1971 when the Sub-Department of Ornithology 

 was established at Tring, the Bird Section Library was 

 transferred there. Ornithological books marked 'Z 1 in 

 this printed catalogue may, therefore, be at Tring now, 

 instead of, or as well as, in the Zoological Department 

 Library. The card catalogues in the Catalogue Room 

 have been altered to show present locations. 



