Copy letter from Robert William Frederick Harrison, to J H Gardiner, 59 Wroughton Road, Balham, S.W. Harrison forwarded on Gardiner's last letter to W L Bragg asking him to identify the reference. He says he thinks the figures required are figures seven and eight on page 284 of 'Proceedings [of the Royal Society]' 89 A, not figure 748 as mentioned. Asks whether electros should be prepared. 23 June 1914