Copy letter from Robert William Frederick Harrison, to the Manager, The British Vacuum Cleaner Company Limited, Fulham, S.W. 'Dear Sir, In reply to your memorandum of the 28th inst. I accept your further estimate for cleaning carpets, and note that you have reserved August 3rd for carrying out the work of removing them. I am., Faithfully yours, Robt Harrison Assistant Secretary'. 31 July 1906