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Letters from George Robert Gray regarding drawings by T Mitchelli, the subscription of a Mr Holmes, and a paper for publication in the Proceedings of the Zoological Society of London

Letter to Professor James Gray of the Zoological Laboratory, Cambridge, regarding his resignation from the Council of the Zoological Society of London

Letters from John Edward Gray regarding John Gould's collection of birds and his subscription to the Zoological Society of London

Papers regarding the Great Ape Breeding Colony at ZSL London Zoo

Plans showing proposed alterations to the Great Ape Breeding Colony

Letter from Captain J G Green to offer a specimen of a barn door hen which had developed cock plumage to the Zoological Society of London

Letter from John Green to David William Mitchell regarding the transport of the hippopotamus on the 'Ripon' for the Zoological Society of London