Copy letter from Herbert Rix, to Messrs Barr, Moering & Company, 36 Camomile Street, E.C. 'Dear Sirs, Enclosed I send you receipt for four shillings paid on the 12th August upon a parcel from Strasburg. I am informed that all charges have been paid at the other end, and I wish to know whether this charge is not an error. The charge for delivery from the docks could scarcely have come to so much? Yours faithfully Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 7 October 1889