Copy letter from Herbert Rix, to Professor John Tyndall, Fellow of the Royal Society 'Dear Sir, Dr [Michael] Foster was in the house when your note arrived & he has asked me to answer it for him. We do not take the Zeitschrift für Hygiene. I send you by Dr Foster's instructions Proc. R.S. ['Proceedings of the Royal Society'] No281 containing the Croonian Lecture. This should be already in your possession. I trust there is no irregularity on the part of the printers in posting the Proceedings to you? Yours truly Herbert Rix Asst Sec [Assistant Secretary]'. 9 January 1890