Copy letter from Robert William Frederick Harrison to Dr R [Richard] T [Tetley] Glazebrook FRS, Bushy House, Teddington, Middlesex 'Dear Dr Glazebrook, Sir Joseph Larmor has asked me to send you the enclosed paper by J W Gifford, and to request you to give you opinion as to the reliability of page 4. I should be obliged if you would be good enough to return the paper, with your remarks, as soon as possible.' 4 June 1910