There is a scanned copy of the June 21, 1931 Dominion Atlantic Railway employee timetable online at the DAR DPI. I love employee timetables.
In later years the DAR's timetable was combined with CPR's timetable. It looks like it happened between 1968 and 1972, because the April 28, 1968 timetable does not have the DAR lines in it, but the April 18, 1972 employee timetable does.
The Dominion Atlantic Railway Digital Preservation Initiative (DAR DPI) is a project to make available materials on Canadian Pacific Railway's Dominion Atlantic Railway, which ran from Yarmouth to Windsor Junction in Nova Scotia. Have a look at their site!