Notebook recording Bateson and Punnett's experiments with sweet peas, marked ‘1906 (1st crosses)’.

The general format of the record is that the parents are recorded as numbers with a superscript or sometimes as a named variety. Since sweet peas can be selfed, some crosses have only a single parent. The date of sowing and the date of planting out are recorded, together with other observations on the plants such as colour. A labelling error is recorded in [page 25r]. The plant on [page 53] is marked ‘Tallest plant in garden, about 6 ft +’.