The thickly forested valley following Massey Creek east of Pharmacy Avenue to St. Clair Avenue is known as Warden Woods. It is believed the name, originally spelled Warden, referred to a warden for the Township of York who lived in the area. Although a surveyed road that separated lots 32 and 33 existed here before the 1840's, it was named considerably later. The 1910 Goad's Atlas records the road as Warden Avenue. The valley's contour has been shaped by the erosion of Massey Creek through the Halton glacial till plain (Toronto's last glacial deposit) and through several underlying glacial deposits.

The...