What is interesting is the degree of contradictions regarding Charlotte. A Charlotte Amelia Hersey was baptized Hampstead Parish 1825 and b. 10JUN1801, the daughter of Samuel and Elizabeth Hersey. In 1871, in Saint John Co., NB, she was b. ca. 1820. At:
http://www.ancestry.ca/genealogy/records/charlotte-amelea-he...she is b. 10JUN1821.
Samuel would appear to have been Samuel Hersey (b. ca. 1776, d. 1851), s/o Samuel and Lydia (Clarke) Hersey. Samuel , Jr. m. Elizabeth Mayes (Maize). He was age 75 years in Wicklow Parish, Carleton Co., NB in 1851. In 1861 he was something like Samuel 'Herzie' (transcribed as Samule Herzio') b. NS ca. 1791? in Wicklow Parish. Samuel 'Hursy' m. Hampstead Parish 13JUN1802 Elizabeth Mayes, so the 1801 birth for Charlotte appears to be incorrect. It would be very easy to read '1821' as '1801'.
Samuel, Sr. was from Yarmouth, NS and moved his family to Gagetown ca. 1776 after being attacked by American privateers.
It's a bit tentative, but it seems that Dennison's wife was most likely Charlotte Amelia Hersey b. Hampstead Parish, Queens Co., NB 10JUN1821.
Thomas.