I am trying to track down Dunsmores from Ireland to Stratford too.
James Dunsmore and Elizabeth (Eliza) Sparrow left Ireland with one unknown child and had a son James at sea on the way here. Birth date is 26 Feb 1842. They lived in the Gore of Downie, Perth County (a few miles from Stratford) on 91 acres on lot 7, concession 5. They also had sons of Ephraim c1844, Thomas c1846 and Joseph c1848. In 1851 census Eliza was married to Cornelius Dingman and the children went to Mich in the mid1850s. I have had no luck on where Ephraim, Thomas and Joseph went to.