Copy letter from Herbert Rix, to Messrs Edkins & Company, 280 High Holborn, W.C. 'Dear Sirs, I am now in a position to accept your estimate for Mr. Spencer's tracings, and I forward the copies herewith. The label as you know is to be omitted, and the author writes that he would like to see proofs*. Yours truly, H Rix Asst. Sec. R.S. Assistant Secretary, Royal Society] *Perhaps it might be safer to let him have half first?'. 28 April 1894