Need References For The Plating Of 1859 #18 And Have Other Questions About The Plating Of It.

Thanks! But do you think that in the book about plating by Ken Kershaw he's giving both details about early and late printings?

The Kershaw books (5c,10c, 12 1/2 and 17c) are great, because the images are large, hi-res, and in real colours, based on plate proofs that became available. They are probably available at Lonley auction, who is the book guru for the main philatelic associations references in Canada.
I also highly recommend you join BNAPS (BNAPS.org which contains great references and also has a newsletter dedicated to Pence and Cents, which is a must for any one interested in the early Victorian issues of Canada.
Themore recent reference for the 17c is based on actual in-use stamps, singles, nultiples, as well as early plate proofs (1859 dark Blue) and late plate proofs (1867) which allows to differentiate re-entries and features that evolved during the 12 printings troughout the life of the single plate. example of those variations include the Burr on shoullder, scratch through oval (pos. 29), fly on hat (pos. 80), to name a few. (available at www.Cartier17cent.com

Wow! Thank you really much for all this detailed information!

Gilles le timbre, I noticed that in the post above that you've inadvertently included an extra ) at the end of the link.

I posted this same explanation in another thread (Canada Cartier No 19 Plating Project) that had two links with the same problem. The links work fine without the extra ).