Contains 5 notebooks:
- Christ Church Meadow Trap, 16 Nov 1927, including instructions to observers by E.M. Nicholson and trapping data;
- Christchurch Meadow Trapping Station Ringing/Recovery registers: Oct 1930-Mar 1935 and Oct 1935-Mar 1941;
- Christchurch Meadow Trapping Station Retraps, 1930-1934;
- Notebook observations of garden birds at various locations, including Oxford, from the 1930s by Ruth Butler, plus loose letters between pages including one by Mary Radford (1933).