Thanks for the replies!
The curious thing is, nothing suggests that the pair were, in fact, Catholic. Both their parents' marriages were according to the Established Church of Scotland. Additionally, after they emigrated to the USA with their young family in the 1920s, they are listed as "Presbyterian."
The usual residence of both groom and bride is given simply as, "Beauly, Parish of Kilmorack." The minister is John Cameron, Roman Catholic Clergyman.