The file comprises articles, some of them accompanied by Condry's notes and correspondence with editors, on miscellaneous subjects, including Africa, autumn, birds and their habitats, birdwatching, migration, forests and woodlands, mammals, nature reserves, historical roads, mountains and moorlands, the Brecon Beacons, Snowdonia, Snowdonia National Park, other national parks, Housman's Shropshire, Walden in the USA, 44 articles for the Liverpool Post entitled 'A Welsh Nature Note', some dated between 1952 and 1959, untitled pieces on Gilbert White, William and Catherine Hutton, the 18th century Birmingham travellers, and the script of a radio programme involving a search for the Black Woodpecker in 1963. The file also includes a photocopy of 'The Breeding Birds of an Area of Central Wales', a report to the West Wales Field Society, which was published in The Naturalist in 1950.

The series comprises loose, printed magazine articles, 1943-1995, newspaper articles 1944-1997, letters, 1952-1999, newsletters, circulars, information leaflets, notes relating to Thoreau's life, the Walden pond and woods, Condry's book on Thoreau (published in 1954) and a lecture which he gave to the Thoreau Society in Concord, Massachusetts, 1981. Recurrent themes include Thoreau's rejection of the conventional values of capitalist society, his life in a cabin by Walden Pond, his friendship with Ralph Waldo Emerson, his writing, admirers and imitators, activities of the Thoreau Society, environmental pressures and conservation of wildlife in Walden and Concord.