Copy letter from Robert William Frederick Harrison, to William Bate Hardy, Fellow of the Royal Society Walker has amended his paper 'Observations on the Life History of Leucocytes. Part II: On the Origin of the Granules', with an additional note referring to the work done by Professor Matthews of Chicago on the 'Origin of Granules from Threads'. This was made a condition of publication by the Physiology Committee, and suggested by Hardy. Asks if this note is satisfactory. 22 March 1907