Copy letter from Robert William Frederick Harrison to Sir David Ferrier FRS 'I am sending herewith Parts VII and IX of the Sleeping Reports which you told me yesterday are missing from your set. I find that the Malaria Reports were issued in 8 parts of Series, as they were called after the first two had been issued; and if my memory serves me alright you have all these. If not, I think we can supply you with copies of the later series.' 26 March 1912