Copy letter from Herbert Rix, to the Director, Natural History Museum, Cromwell Road 'Sir, Will you be good enough to cause us to be furnished with the names of the Second Class Assistants of Six Years' Standing in the Natural History Museum, in order that invitations may be sent to them for the Society's forthcoming Conversazione. Yours truly H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 2 April 1894