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Contents of an envelope inscribed 'alleged mutations'. Letters by J.S. Martin (Bateson not the recipient) at D.112; notes and printed pamphlets by Martin on variations at D.112, D.113. Included also are photographs.

Brief correspondence to Bateson concerning mutations in various life forms including micro-organisms and crabs; printed report of a meeting of the Linnean Society of London, 16 November 1911. Correspondents include C. Dobell.

Correspondence to Bateson, with printed material, relating to ostrich breeding.

11pp unsigned manuscript draft of a paper; in French. Unidentified handwriting.

Letters to E.J. Collins of the John Innes Horticultural Institute from Laxton Brothers and R.C. Punnett, with a typescript copy of Laxton's paper, 'Notes on Some Changes and Variations in the Offspring of Cross-fertilized Peas' from 'Journal of the Royal Horticultural Society'.

Copy of a letter by C. Pellew on the Persian Pea; undated photograph of a 'new rogue' pea.

Two letters to Bateson from G.H. Shull, Station for Experimental Evolution, Carnegie Institution of Washington, USA, relating to 'twin-hybrids' of Phaseolus. Included are manuscript notes and data.