(en) « From the archives: Lady Rose blossomed after scandal », Montreal Gazette, (consulté le ) : « They met early the following morning, May 22, at the race track in Verdun. Pistols were raised, but only Sweeney fired. Warde fell, mortally wounded. A farmer witnessing the affair passed a sobbing Sweeney and said, “You have had a bad beginning to the day.” It was the last fatal duel in Canada. »
rcinet.ca
(en) « The last duel in Upper Canada », RCI, (consulté le ) : « This was however not the last fatal duel in what is now Canada. »
