How Could Brtian Get Better Terms Before The End Of The 19th Century

So I was thinking over Ming's timeline and some other 'Canada gets more' forums. I then came up with this questions.

It is pretty much accepted that in the last decade or so of the 1800's and defiantly into the start of the 1900's that the USA's mainland territory was fermily set and that neither Canada nor Britian could really grab more land bellow the boarder without pissing off the emerging superpower.

Still I've heard people say that between American Revolution and the end of the century, their were a number of chances for them to get control some parts of land that fell to America (like France's selling of their territory in America, some of the US's land along the Great Lakes, etc).

So my question is in this periods, what is land that Britain could take control of (through treaty, better 1812 showings, etc) collectively over the century that would be able to keep to incorporate into Canada later?
 
There was a thread* on this a few years ago where a slightly different 1812 treaty settled on watersheds as boundaries thus Canada developed with a slightly more southerly border.
THis worked out with an improved Canada at no cost to the US.
Some interesting ramifications for the US Rust Belt and Seatle.

*Search not being my friend today and I cannot recall the AH Elder who created it.
 
Top