Letter from William Henry Bragg to Ronald Winckworth, regarding a paper 'The fine structure of collenchyma cells in Heracleum Sphondylium L' by G P Majumdar and Reginald Dawson Preston Sectional Committee: Botany Recommended for publication in the 'Proceedings of the Royal Society of London'. Finds the x-ray sections satisfactory, especially as they have been passed by William Thomas Astbury. Cannot judge the botanical part. [Published in the 'Proceedings of the Royal Society of London'] No received date. 17 June 1941