@ MtheGM - traditionally Scots spelt it either way. Or I guess that depends how far back you want to go. A century ago the legal Scottish spelling was with the 'e' and it's only in the past few decades that they've got all precious about spelling it the other way, and that, primarily at the prodding of Americans who made a big deal out of the difference. Canadians use the e-less spelling now but that was not always the case on Canadian whisky labels either. A few years ago I published an article about this on the Malt Maniacs website but I think the Fake AP Stylebook covers it much more eloquently with this comment: "You don't spell whisky, you savour it."
Here's a link to my (lengthy) article: http://www.maltmaniacs.org/malt-109.html#0810