The Web Site "Bytown or Bust" at http://www3.sympatico.ca/ag.lewis/history.htm
has many of the Rideau Canal labourers listed (and still looking for more).
David: Do you mind if I add your "Acton" surname to the web site with your e-mail address as a contact for other researchers/genealogists? Ditto for Bonnie, if you wish to send me a surname in which you're interested.
... Al Lewis