You might want to put up a query at the Canadian sight, looking for the baptismal record of Theophile Rock b. 1853, locating his parents. Also the Theophile Rock, Jr. B. 1875 Montreal. It appears that Theophile Rock (Sr) went to Canada and then to VT. His marriage does not appears in the US. Also, his father Manuel died 1870 if you haven't found it. Also, trying tracking down Eva Rock through Vermont Historical Societies or maybe city directories. Another thing is maybe put a query up for a Theophile Rock marrying a Brunelle or the variation of that name.