Letters from Thomas Hillier to Philip Lutley Sclater regarding complaints made about the nuisance arising from the drainage of the gardens of the Zoological Society of London into Regent's Canal
Letter from Thomas Hyde Hills to Philip Lutley Sclater regarding great coats for the keepers of the gardens of the Zoological Society of London
Letter from Edmund William Hunt Holdsworth to Philip Lutley Sclater regarding ornithology
Letters from Sir Joseph Dalton Hooker to Philip Lutley Sclater regarding collections of birds and botany
Letter from Sir William Jackson Hooker to Philip Lutley Sclater regarding trees and shrubs he sent to Ascension Island, and ornithological advice for the Admiralty
Letters from John Alexander Hope to Philip Lutley Sclater regarding his subscription and election of the fellowship of the Zoological Society of London
Letter from John Horrocks to Philip Lutley Sclater regarding his subscription to the Zoological Society of London
Letter from Victor Alexander Haden Horsley to Philip Lutley Sclater asking when Mr Sawyer's elephant was likely to drop her calf
Letters from William Henry Hudson to Philip Lutley Sclater regarding cuckoos, shipments of birds to the Smithsonian, Woodpeckers in Argentina, Blackbirds and other birds
Letters from Martin Theodor von Hueglin to Philip Lutley Sclater regarding his departure for Spitzbergen and his treasures of the three natural kingdoms