Lord Stanley, who became the 13th Earl on the death of his father in 1834, was one of the most important natural historians and zoologists active in Britain during the first half of the nineteenth century. He was President both of the Linnean Society and the newly founded Zoological Society of London. It was there that he met the young Edward Lear, who was making drawings of the parrots, forty-two of which the artist published in a lavish folio volume, Illustrations of the Family of Psittacidae (1832). As a result Lord Derby invited Lear to Knowsley to draw the exotic birds and animals that he had collected from all over the world, and which lived in specially designed aviaries and menageries. Lord Derby’s private zoo became the largest and most important of its type in Britain.
Lear worked at Knowsley intermittently for the next five years, concentrating all his energies on depicting living and dead specimens of animals in beautifully delineated and vividly coloured drawings that are now thought to be some of the finest natural history studies ever made, even rivalling the work of his famous American contemporary John James Audubon, who also visited Knowsley at this time and corresponded with the 13th Earl. A selection of the finest of Lear’s watercolours were published in 1846, faithfully lithographed by J. W Moore in the first of two volumes entitled Gleanings from the Menagerie and Aviary at Knowsley Hall, a work financed by Lord Derby and edited by John Gray of the British Museum, who also selected the plates and wrote the accompanying texts.