Copy letter from Robert William Frederick Harrison, to T H Williams, 4 Southampton Row, W.C. With reference to Williams' letter of 21 October, Professor Rutherford's paper was published in separate papers 'Philosophical Transactions [of the Royal Society]' A 189. Mr Marconi's paper appeared in the 'Proceedings of the Royal Society' 463. Williams could see both these publications at the patent Office Library or purchase them from Messrs Harrison & Sons, 45 St Martin's Lane, W.C.. 25 October 1905