Hey Patric, thank you for helping! and thank you for identifying the chainring. Please don't take our lack of help/response to your helpful posts personally. The truth is there are so very few of us (CDN bicycle collectors) around to offer any kind of response, and from among this small group I think almost nothing is known about the Hyslop Brothers. The closest thing we have in Canada to the CABE is a site called Vintageccm.com. I started a thread there about Hyslop and didn't get a single response from anyone. You can still hear the crickets. The 1916 article posted by Barracuda just now has taught me more about Hyslop than I've known in my lifetime up until now, and I wrote my major university paper on "Technological Innovation in the Canadian Bicycle Industry". Hyslop doesn't even have a Wikipedia page, but the Fran's Diner restaurant that occupies the spot at the NW corner of Victoria and Shuter where the Hyslop building used to stand has a Wikipedia page. I've eaten in that Fran's and at the time I had no idea that 100 years ago I would have been sitting in the Hyslop Cadillac showroom (For anyone who's visited Toronto, Hyslop was located across the street from Massey Hall, just east of the Eaton's Centre.) Anyway, Patric, thanks for giving at least one hoot about Canadian bikes, if not two hoots
Please keep the great info flowing north. Cheers.