Contents of four envelopes which are listed separately below. Inscriptions on the envelopes are reproduced. The box in which the envelopes were found contained the following note on a piece of paper: 'Broad Bean variegation to sowing of June 1925'. This piece of paper has been included in B.8.

Correspondence, chiefly with the Principal of the Agricultural Institute, Kirton, Lincolnshire, re strains of cabbage sent to Bateson for a breeding experiment.

Correspondence to Bateson during Backhouse's periods of work in Argentina. He discusses the progress of his scientific investigations, chiefly of wheat, and also gives general details of his experiences and observations while in Argentina. Included are photographs sent by Backhouse as follows: at K.2, 15 showing, variously, some colleagues of his (J. Williamson and H. Amos), scenes from his working environment, and general scenes of Argentina; at K.4, 4 showing wheat and rye. Most have been annotated on the back by Backhouse, often with detailed notes.

8pp typescript draft with manuscript revision; further typescript draft; revised version with copy of Darlington's letter to the publisher.