Letter from Alfred Hay, 35 Lissenden Mansion, Lissenden Gardens, Highgate Road, London, to [Robert William Frederick] Harrison 'Dear Sir, I understand that that [sic] before his departure for South Africa Professor H S Hele-Shaw, F.R.S., intimated to you his desire to send in a joint paper by ourselves, as well as to communicate a paper by Mr P. H. Powell, B. Sc. These papers are now ready, and I shall be gald to hear from you whether I may send them in. Yours faithfully, Alfred Hay'. 15 February 1904