Contains correspondence from various institutions, societies and organisations, including: various universities; the British Association for the Advancement of Science; the Cambridge University Natural Science Club; Royal Scottish Museum; British Cattle Breeders' Club and others, demonstrating the wide range of organisations at which Waddington was invited to lecture.

Folders generally include correspondence along with schedules and programmes of the events.

Includes: notes and data relating to rabbit sex control experiments; two handwritten drafts of lectures, 'Sex Ratio Control - what are the prospects?' (noted 'BCBC 13 Jan 1981 Cambridge') and 'The Perplexing History of Attempts to Control the Mammalian Sex Ratio' (marked 'Newcastle 14/10/82'); various article reprints by Beatty, Anne McLaren and Douglas Falconer and a typed first draft of 'An attempt to influence the sex-ratio in rabbits using immunological methods' by Beatty.