Copy letter from Herbert Rix, to Horace Darwin 'Dear Sir, We shall be glad to receive some of your instruments for exhibition on June 17th preferring at the same time those which are not too technical for the ladies. If you will fill up the enclosed schedule it will give us all we want to know at present. We have heard from Mr F. [Francis] Darwin about his exhibit. Yrs [Yours] faithfully H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 3 June 1891