Map of the Permanent System of Highways, District of Columbia, 1914.
Published by the Office of the Engineer Commissioner, Washington DC, 1914.
Printed by The Morris Peters Company, Washington DC, 1914.
Used by Gen Sir Augustus Francis Andrew Nicol Thorne to mark the location of the house (Greystone, Kingle Road, Rock Creek Park Road) he rented and its relationship to his office.
Probably sent home to his wife, he drew a sketch plan of the house on the back of the map and made notes about the accomodation and services available.