Built in the early 1930s as part of Robert Home Smith's Humber Valley Surveys, the Riverside Trail residence was a stone manse overlooking the Humber River. Over six weeks, Ouroboros recovered 372 tonnes of material, including walnut paneling, a Tyndall stone hearth, Credit Valley sandstone, and period light fixtures, avoiding approximately 133,000 kgCO2e of embodied carbon.