Letter from William J. Mayo to Dr. Armstrong written from Rochester, Minnesota on his personal letterhead. Mayo thanks Dr. Armstrong for the honour to be conferred on him by McGill in June, 1923. He will be happy to attend.
Letter (signature illegible) to Dr. Armstrong written on Militia and Defence, Ottawa letterhead. Letter writer explains Armstrong's duties in the Medical Services of the Military and the problems he is having to secure appointments and promotions.
Letter from J. W. Scane to Dr. Armstrong written on Faculty of Medicine, McGill University, Dean's Office letterhead. Scane as assistant dean sends the letter containing the resolution passed by the members of the Faculty of Medicine expressing sympathy to Dr. Armstrong at the death of his son.
Letter from Arthir Meighen to Dr. Armstrong written on Prime Minister's Office, Canada letterhead. Meighen thanks Armstrong for his chairmanship of an event Meighen attended in Montreal and his kind and generous words.
Letter from Colonel J. W. Bridges to Colonel Armstrong. Bridges demobilizes Armstrong and requests him to fill in the application forms for the reserve.
Copy of the resolution passed by the Medical Board of the Montreal General Hospital written on hospital letterhead regretting the resignation of Dr. Armstrong from the hospital staff. Signed by J. Alex Hutchinson, Secretary of the Medical Board.