In 1860, his wife Louise was living in Sutton, Worcester County, in Massachusetts. We can assume from the Census that she is a widow. Lucky enough, I found two contracts signed before notary Timothée Brodeur in St-Hughes to give us a hint about when François Tourville died and confirm the fact that Louise Corriveau was indeed a widow when she moved to Massachusetts.
The first one is dated February 14, 1854. The document states that François Hubou dit Tourville and his wife Louise Corriveau, both residents of St-Jude, acknowledge receipt for the fourth payment that was due last January “of this year” for the sale of a land that was made by François to Bazile Richard, on March 30, 1850 before the same notary. The buyer is the owner of the neighbouring land.
The second contract was dated January 26, 1855 where Louise Corriveau, widow of the late François Tourville, resident of St-Jude, acknowledges receipt for the last payment regarding the sale of a land made by the late François Tourville, to Bazile Richard.
I have checked the St-Jude and St-Hughes church records for 1854 and early 1855 and I haven’t find anything. Was François planning to move to Massachusetts and he died on his way to the States or in Massachusetts? When his son Alexandre married in 1856, he states that he is from the United States. Did the family leave right after receiving that last payment? Généalogie Québec has baptisms, marriages and death entries indexed until 1850. When the years 1854-1855 will be indexed, maybe we will find his death record in another parish.
At least, we now have a timeframe to continue the search.