Notebook recording Bateson and Punnett's experiments with sweet peas, labelled inside 'Naturals sown 1905 in garden and on town land'.

Records are paginated 250-343, followed by a set of notes [paginated by the archivist, pp 344r-359] and a run of blank pages. At the back of the notebook are maps of the plant plots [pp vii-xi].

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 or planting out is often recorded, together with other observations on the plants such as colour.

Some plant records are marked 'important' e.g. those on [pp 261v-265 and 311v-312]; some others are marked 'good' or 'good lot' e.g. [pp 296v-297 and 304v-305]. The record on [page 290r] concludes with the note, 'W.B. [William Bateson] says "rubbish"'. That on [page 295] records that a sown meadow 'came badly: probably through moles'. There is also a detailed note on [page 355] and a schematic chart on [page 358v].