Copy letter from Robert William Frederick Harrison, to Sir William Macewen, Fellow of the Royal Society In response to Macewen's letter of 11 May, the Secretaries have reserved a place in the list of papers for 7 June for his projected communication 'On the regeneration of bone', but they will need a manscript of the full paper to be received at the Royal Society prior to the meeting. Harrison also asks that a short abstract be sent, around 1 octavo sheet, to allow him to set it up for the use of Fellows at the meeting. 1 June 1906