Street View of Colchester, Ontario, 1925. It seems to give the lie to Colchester being, or ever having been, larger than Harrow. This would be what I knew as Highway 18A, view toward the West. The building on the left might be what was once George McVittie’s General Store. The turn to the right would lead to Sinasac’s Inn, but before that, the future(?) Highway would continue westward. I seem to remember the building at the end of this street as a bit smaller. More data and credits at http://swoda.uwindsor.ca/node/1572. Click to enlarge.
View of a very sparsely urbanized Colchester, Ontario