Toronto August 24-1912. Saturday. Spent the morning at the Don Brick yards in northeastern Toronto. One gets a streetcar - Church street line - opposite the Dalhau Hotel and goes to the end of the line. Then about half mile down into the valley of the Don. At the top of the Don Brick Co quarry there is about 100 ftb of glacial material - sands but mostly clays - and then about 80 ftb of thin bedded limestones and shales of a dark blue color used for brick making. The percentage of argilla-ceous limestone does not exceed 10%. Bryozoa are the predominating fossils and especially my delicate forms here seen attached to slabs of hardlimestone: Gyzyrophia modesta, Plectam-brites auriculus and probably also Del. testudinaria. The quarry foreman told me they also get large Jostetus gigas and Orthoceras for building. Took a small collection of all the good things I could see. These beds appear to me to be Upper Eden and possibly also basal Lorraine.