...that the engineering for the 3ft6in gauge Toronto, Grey and Bruce Railway in Canada included three major bridges at the crossing of the Humber River, the Grand River, and the Saugeen River at Mount Forest, Ontario; and the ascent of the Caledon Mountains between Mono Road and Charleston (now Caledon village) which involved a reverse curve of 500 feet radius and a gradient of 2% or 1:50? -