The Founding of Teeswater
By 1855 the first permanent settlers on the site of Teeswater, the families of Matthew Hadwen and Peter Brown, had located here on the Tesswater River, In that year Brown erected a saw-mill and later added a grist-mill. In 1856 a post office was established with Hadwen as first postmaster. Although the settlement's early growth was slow, a tannery, a foundry, two taverns and a pearl-ash factory were in operation by 1867 when the population numbered some 400. The development of the community was spurred by the completion of a branch line of the Toronto, Grey and Bruce Railway in 1874 from a point near Orangeville. Teeswater was incorporated as a Village on January 1, 1875, with a population of about 700.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.