Notebook, 'Reference book of coleoptera. Vol I', 1916-18.
 Typescript journal, 'Voyage from Dublin in four masted barque 'Passat'. June 1934'.
 Notebook, 'Isbjorn Expedition 1937. Excavation notes'.
[4-7] Typewritten report of a visit by Lethbridge, G.E. Fowler, C.S. Leaf, and R.N. Sayce to Cerne Abbas to gather evidence for pagan practices near Giant on May Day eve, undated.
 Typescript, photographs, and 'Notes. Anglo-Saxon cemetery, Lackford', undated. (c.1947).
 Notebook on pins, notes, and sketches of pinheads. From the back of the volume run the essays 'Two ancient representations of boats', 'Heather and ice', and 'Celtic monks in the far North'.
[10-12] Notebook, 'Roman burials at Linton Village College'; notebooks and miscellaneous notes (2).
[13-59] Letters to Charles Frederick Tebbutt (1900-85), 1947-71; Tebbutt, typescript, 'Pagan Saxon burials at Lt. Paxton, Huntingdonshire', undated.
[60-99] Margaret A. Murray and others, letters on witches, etc., 1957-61.
 Notebook on paranormal phenomena, Hole House, Branscombe, Devon, undated.
 Letter to Lethbridge from Sir Ellis Minns (1949).
[102-122] Miscellaneous sketch-illustrations for articles, and papers.
[123-127] Letter to Lethbridge from Harold H. Brindley (1939) and photographs of the boat Cognac Packet.
[128-155] Gordon Fowler, versions of a paper on 'A prehistoric bridge in the Cambridgeshire fens'; a draft by E. J. Andr Kenny, 'A Roman bridge in the fens', 1933; 'Fenland waterways past and present. South Level District. Part III'; 'A report to the Fen Research Company by Gordon Fowler. July 1933'; and newscuttings on King John's Treasure, c.1933-37.
[156-157] Roy Rainbird Clarke, notes on 'The ancient road between Ely and Cambridge', 1933-36, given to Gordon Fowler; Fowler, notes on a Roman causeway near Salter's Lode Sluice, Downham Market, Norfolk.
[158-167] Letters to Gordon Fowler from A.G. Brighton, Sedgwick Museum, Cambridge, 1932; H. Godwin, Cambridge, 1932; Andr Kenny, 1932; William A. MacFadyen, Sedgwick Museum, 1932 (3); Noel Teulon-Porter, 1933 (2); and two copy letters from Fowler about the Fen Research Company, 1932-33.