Think the line actually is:

"And through the night, behind the wheel, the mileage clicking west
I think upon Mackenzie, David Thompson and the rest
Who cracked the mountain ramparts and it did show a path for me
To race the roaring Fraser to the sea.

Amazed at the location of the ship and how far they had actually travelled - a great deal further on than Baffin Bay mentioned in the song "Lord Franklin" or "Lady Franklin's Lament" - although that could have been due to natural drifting of a raft of ice holding the ship:

"In Baffin Bay where the whale-fish blow
The fate of Franklin no man may know.
The fate of Franklin no tongue can tell
Where Franklin along with his sailors do dwell"