Copy letter from Herbert Rix, to William Henry St John Hope Rix states that it is difficult to be precise, but provides a breakdown of the Royal Society's usage of candle-powered lamps on regular weekdays, including stating the additional use of an extra lamp to locate a book, illuminate Rix's office, and host a visitor. Council days, once a month, and meeting days, 25 times a year, are noting as requiring extra illumination, likely to be similar to that of the Society of Antiquaries. 8 November 1888