Copy letter from Herbert Rix, to Alfred Bacje, Institute of Mechanical Engineers 'Dear Sir, Your demand for five consecutive numbers of the Proc. R.S. ['Proceedings of the Royal Society'] rather surprises us! These are delivered by hand by our own messenger, & it is incredible that he should miss you five times recurring. Please make further search for the missing nos (298-302). Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 1 February 1892