Copy letter from Robert William Frederick Harrison, to Professor [William Henry] Young, Fellow of the Royal Society His paper on 'Trigonometrical series who cesaro partial summations oscillate finitely' has been accepted for publication in 'Proceedings [of the Royal Society]'. Has been directed to ask whether he will abbreviate the analysis which appears from page four onward. Returns the paper for amendment. It has also been suggested that he might give an explicit statement of the results proved by M Riesz in the Mathematische Annalen 71, as these appear to be nearest to his results. 1 July 1913