Copy letter from Robert William Frederick Harrison to The President, The Imperial Society of Naturalists, Moscow 'I am directed by the President to acknowledge your letter of March 29 and to say that it was a great pleasure to him to do what he could to further the objects of the expedition contemplated by your Society. We have now received a latter from the Niger Company, of which I now enclose a copy, and I am to ask you to be good enough to communicate direct with the Secretary of that Company as to the date of departure of your expedition and its expected time of arrival.' 1 May 1911