Copy letter from Herbert Rix, to Percival Spencer Umfreville Pickering, Fellow of the Royal Society To supply Pickering with the list he wants would take something like a week's work amongst the archive but Pickering will find in an article Rix wrote for the ninth edition of the 'Encyclopedia Britannica' a very imperfect memoranda on some of the occassions upon which the Royal Society have helped the Government. 19 January 1891