Copy letter from Robert William Frederick Harrison, to Dr [Silvanus Phillips] Thompson, Fellow of the Royal Society Asks what he thinks of the enclosed offer from Dr Edridge-Green [no enclosures]. He may have the opportunity of examining his puctures at advising first hand. If his invention is sound, Professor [Arthur] Schuster thinks it would make an interesting exhibit, but Dr Green is known so well here that it has been learnt to take his assertions with a pinch of salt. 22 May 1914