Leslie, hello.

Le Grand Derangement occurred between 1755 and the mid 1760s. That said, do you know any phrases from the song? To complicate matters, 1755 is a group, and I'm not aware of any song entitled "1755" done by Bois Joli, but then I'm not an authority on anything, either. Without a bit more to go on, this will be extremely difficult to track.

When did you first hear it? What's the 'story line'? That said, do you know any phrases from the song?