John Rennie: Enlightenment Engineer - Biography by Roger Donway. Highlights Rennie's construction of the new London Bridge. - http://www.objectivistcenter.org/ct-928-John_Rennie_Enlightenment_Engineer.aspx
John Rennie - Brief biography with portrait from the BBC historic figures. - http://www.bbc.co.uk/history/historic_figures/rennie_john.shtml
Wikipedia: John Rennie - Biography and portrait, projects list and related links. - http://en.wikipedia.org/wiki/John_Rennie_(engineer)