The Adamson Estate, which forms the eastern boundary of the Port Credit neighbourhood of Mississauga, Ontario, was purchased from the family of Agar Adamson by Credit Valley Conservation Authority in 1975 upon the urging of the local ratepayers group known as Project H21 after a proposed real estate development which would have changed the character of the neighbourhood.
Their legacy comes from supplying eastern white pine logs for ship masts in the British Royal Navy.
Agar Adamson designed and built the Belgian-style mansion on this land in 1919, after returning from the wartime service in France.
One of the treasures of the Adamson Estate are the great eastern white pine, the provincial tree of Ontario, which remain on the site and are ties to the heritage of the Adamson/Cawthra families and that of the early development of Toronto Township, Peel County, now known largely as Mississauga, Region of Peel.
Another element of interest is the family pet cemetery which has been recently surrounded by a wrought iron fence with stone pillars and memorial plaque.