The book of Dow has a number of errors, and can't be relied upon for accuracy. It's a good starting point, but it's important to verify the information.
You may have noticed that in the book, Enoch had a brother Hammond.No info is given on him. There is a Hammond b. abt 1841 in the census. This could be Enoch's brother.
1871 Census of Canada about Hammond Dow Name: Hammond Dow Gender: Male Age: 30 Birth Year: abt 1841 Birth Place: New Brunswick Marital Status: Married Religion: Baptist Origin: English Province: New Brunswick District: York District Number: 179 Division: 02 Subdistrict: Canterbury Subdistrict Number: k Household Members: Name Age Hammond Dow 30 Hannah Dow 30 Celinda Dow 10 Lorenna Dow 8 Hope Dow 6 Luke Dow 4 Leonard Dow 2
1891 Census of Canada about Hammond Dow Name: Hammond Dow Gender: Male Marital Status: Married Age: 52 Birth Year: abt 1839 Birthplace: New Brunswick Relation to Head of House: Head Religion: Baptist French Canadian: No Father's Birth Place: New Brunswick Mother's Birth Place: New Brunswick Province: New Brunswick District Number: 25 District: York Subdistrict: Canterbury Household Members: Name Age Hammond Dow 52 Hannah Dow 51 Loic Dow 22 Hopie Dow 20 Lake Dow 19 Norra Dow 17 Benjamin Dow 15 Theresa Dow 13 Ettie Dow 11 Hubert Dow 9 Mile Dow 7