Hard-back notebook, some loose pages. Both ends of book used. Inside the front cover is a note 'On the Chromosome Behaviour and Origin of our Cherries' and further notes for a collaborative paper on the subject with 'M.B.C.' [Crane]. Intercalated on front page is a manuscript, 'Diary of Occupation' of work and collaborators at Merton, 1923-1928. Book includes records of experiments on Prunus, Ribes, hyacinth, begonia, etc.