"A 10 pages brochure dating from the 1920's sponsored by the Bramsons Yellow Taxicabs Co. of Montreal. Include Montreal landmarks and history and descriptions of all the tours the company offered with a map of Montreal. This brochure was given to tourists arriving in Montreal on Gray Line Tours buses."
The centre pages include a little map of the tours around Montreal, giving an idea of the layout of the Island at the time.
This copy isn't dated. I'm pretty sure I bought a similar booklet on ebay a couple of years ago maybe a different edition, I'll have to go check at the back of the cupboard.
While I'm on the subject, the Internet Archive is a great place to search for information and inspiration of all kind, whether it be books, music or old time radio dramas for scenarios.