The language is occasionally difficult just because it was written over a century ago, and there are some obscure historical and cultural references that might trip up the unwary modern reader, but that's where Shmoop can help.
Interac e-Transfers are only available in Canada for individuals who have Interac-partnered bank accounts (most of them). So, no you cannot use Interac e-Transfer in the U.S. That being said, Interac does have a collaboration with Mastercard and Western Union to allow Canadians to send International Transfers.