I've spent hours pouring over any baptismal, marriage, and other records I can find = and I feel like I am no closer to figuring out this today then I was weeks ago. Not sure if this helps but I have a
Bernard Masten that was born sometime between 1799 and 1804 based on his age given in the 1861 Census of Hillier Township, PE County, Ontario and the 1851 Census of PE County. I presume that this is the same Bernard Masten listed as married to Electa Knapp (1806-1894) in the webpage of the "Kanadianmasten" by Lynda Anne Mastin Payne. I also found that Electa Mastin was listed as 45 years old in the 1851 Census of PE County (p. 10).
Here's another bit of information
Eleanor married Minard MASTIN, son of Jonathan MASTIN and Mary LEAVENS, on 1 Nov 1836 in Marysburgh Twp., PE Co., Ontario, Canada. Minard was born 1801 in Canada. He died in PE Co., Ontario, Canada.
They had the following children:
Eliza MASTIN was born 1841 in West Lake, Hallowell Twp, PE Co., Ontario, Canada.
Guy Henry MASTIN was born 5 Jun 1839 and died 1916.
Gilbert E. MASTIN was born 1847 and died 1922.
Catherine A. MASTIN was born 1844 in West Lake, Hallowell Twp, PE Co., Ontario, Canada.
http://www.vanvlack.net/Descendants/aqwg08.htmGiven the dates Jonathan Mastin and Mary Leavens most probably immigrated to Canada.
Not sure if this is any help....but at least it is something.
Found lots of Catherine Mastens - but none seem to the one you are looking for.
Back to my brick wall :)
Susan