Copy letter from Herbert Rix, to Professor Richard Threlfall The separate copies of Threlfall and Adair's paper have been sent to Threlfall by the Messrs Trübner. The printers have omitted the plate. Rix thinks the best course it to send the plates separately. Any expense Threlfall is put to having the plates inserted will by met the Messrs Harrison. 25 February 1890