Miscellaneous notes and observations, correspondence and information from outside observers.

Notes on books and articles read, annotated offprints, observations by outside observers, correspondence.

Notes and correspondence.

Notes on books and articles read (includes notes and information in other hands), section of corrected manuscript on swifts in flight with comments and notes (by John Barlee?), correspondence.

Notes on books and articles, correspondence.

Observations and field notes (especially at Tring, 1956), charts, notes on 'autumn migration 1955', 3 page draft of 'The spring arrival', data, with report and letter from J.F. Scott, correspondence.

Notes on books read, observations and field data, observations and data sent in by outside observers, correspondence.

Miscellaneous notes.