Copy letter from Herbert Rix, to Captain William de Wiveleslie Abney, Fellow of the Royal Society 'Dear Capt Abney, Your full paper is in the hands of the referees. I will write and try to get the diagrams back, but I cannot carry out your motto 'bis dat qui cito dat' as it will take a day or two to get them returned. Please bear in mind that you did not enclose Sir Howard Grubb's letter. I shall be glad to have it when convenient to you. Yours truly Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 25 January 1892