A map from 1920 of the southern part of the province of Ontario. The map shows the capital of Ottawa, provincial capital of Toronto, major cities and towns, existing and proposed railways, county boundaries, forest reserve boundaries, national park boundaries, Indian reserve boundaries, lakes, and rivers of this portion of the province. The latitude and longitude grid is shown at one degree increments. A grid-key in the margins references the locations of principal cities and towns, and the counties and divisions of this portion of Ontario.