[Mr. Lucky]

Try Googling on something to the effect of" Judah P. Benjamin Canadian Constitution".

It's an interesting story.

[Non-Sequitur]

Try Googling on something to the effect of" Judah P. Benjamin Canadian Constitution".

OK, I did. Among other things it pulled up a 1970 article from the Toronto Law Review by Jonathan Robinson that shows Benjamin played no part in the creation of the British North America Act. Link. You need JSTOR access to read the whole paper.