The file comprises miscellaneous articles, 1957-1989, on the seasons at Ynys-hir, birdwatching in Wales, particularly on Bardsey Island, individual bird species, such as swallows, marsh and willow tits and woodlarks, migratory birds, nature conservation in Wales, red squirrels the wildlife of historical sites and conifer forests, with relevant correspondence, lists of photographs and captions to accompany the articles.

The file mainly comprises articles, 1948-1987, on miscellaneous topics, including African birds, different types of trees, shrubs and woodlands in Wales, including alder buckthorn, ash, beech, birch, oak, wild service and conifers, the conservation of woods, birds such as the cuckoo and Montagu's harrier, the Brecon Beacons and Pembrokeshire Coast national parks, the nature of the Welsh Marches, River Wye, Powys and Newborough Warren, pine martens, red squirrels, butterflies, and obituaries of David Paish and Tommie Warren Davies, with related correspondence, notes and synopses.