Polson Iron WorksKnapp's Roller Boat

No need to write about Knapp's Roller Boat, as there are so many articles and references to it. Try these:

THE WAY WE WERE: Roller Boat more impressive in watercolour than – Toronto Sun article by Mike Filey

Roller Ship – Wikipedia, posting

Historicist: Frederick Knapp's Roller Boat, Torontoist

Knapp's Roller Boat – Toronto Historical Association

Or buy "Toronto The Way We Were", or "Toronto Sketches" both by Mike Filey.