One result of the ancient down-rush of waters, just about here, was that on both sides of the river there were to be observed several striking specimens of that long, thin, narrow kind of hill which is popularly known as a "hog's back." One on the east side afforded, along its ridge, a convenient ascent from the meadows to the table-land above, where fine views up and down the vale were obtainable, somewhat Swiss in character, including in the distance the lake, to the south. Overhanging the pathway, about half-way up, a group of white-birch trees is remembered by the token that, on their stems, a number of young men and maidens of the neighbourhood had, in sentimental mood, after the manner of the Corydons and Amaryllises of classic times, incised their names. The west side of the river, as well as the east, of which we have been more especially speaking, presented here also a collection of convergent "hog's backs" and deeply channelled water-courses. One of the latter still conducted down a living stream to the Don. This was the rivulet already noticed as entering just above the Island. It bore the graceful name of "Castle Frank Brook." _4.--Castle Frank._ Castle Frank was a rustic château or summer-house, built by Governor Simcoe in the midst of the woods, on the brow of a steep and lofty bank, which overlooks the vale of the Don, a short distance to the north of where we have been lingering. The construction of this edifice was a mere _divertissement_ while engaged in the grand work of planting in a field literally and entirely new, the institutions of civilization. All the way from the site of the town of York to the front of this building, a narrow carriage-road and convenient bridle-path had been cut out by the soldiers, and carefully graded. Remains of this ancient engineering achievement are still to be traced along the base of the hill below the Necropolis and elsewhere. The brook--Castle Frank Brook--a little way from where it enters the Don, was spanned by a wooden bridge. Advantage being taken of a narrow ridge, that opportunely had its commencing point close by on the north side, the roadway here began the ascent of the adjoining height. It then ran slantingly up the hill-side, along a cutting which is still to be seen. The table-land at the summit was finally gained by utilizing another narrow ridge. It then proceeded along the level at the top for some distance through a forest of lofty pines, until the château itself was reached. The cleared space where the building stood was not many yards across. On each side of it, the ground precipitously descended, on the one hand to the Don, on the other to the bottom of the ravine where flowed the brook. Notwithstanding the elevation of the position, the view was circumscribed, hill-side and table-land being alike covered with trees of the finest growth.