Great find on the marriage! Welcome to rootschat marwiller
First commissioned rank: Oct 1 1840...Not seen any info as to his actual regiment....
The 1865/66 directory in NewBrunswick had him already working the military store
Didn't find anything positive on the brothers, PatR but just jotted down the odd thing in order from the earlier finds by rootschatters...and other bits as they came up...I imagine you have it all by now, though...
1854 married Louisa Mary ( Catherine) Creighton N.S. Canada
c. 1856, John J. Doyle Bagenal b 1859 Francis H Walsh Bagenal James J.B.Bagenal 1861
1863 New Brunswick - Captain Henry Sedley Bagnal ( of the Military Staff,) married Eliza Maria Jessey Doherty (O'Doherty)
http://trove.nla.gov.au/ndp/del/correction/8819368 also in channel bmd as "Eliza Josephine Doherty"
? c.1864/1865 John Henry Beauchamp Bagenal d.1897 Mile End Old Town, London, England
1869 African Commissarian Dept.
Superintendant of stores ( deputy commissary) stationed at Devonpt. GunWharf Feb. 12 1870
1871- Superintendant of stores in Guernsey
1871 birth of Edmund William Beaucamp bengal
https://familysearch.org/pal:/MM9.1.1/FGBM-K6T 1872/73 - Devonpt. GunWharf
1873 death of son Edmund William Beaucamp Bagenal
1874 death of Eliza
1874/1875 retired
http://books.google.ca/books?id=VuERAAAAYAAJ&pg=PA2691877- married Anna Frost 187 1880 Ada Mary George Sedley 1878
There is a Clara Gertrude Bagenal 1882 Camberwell, the other surnames appear as Bagnall/Bagnell etc.
Likely relatives 1817 87th Reg of foot ....ensign Robert Sedley Bagenall, Lt. John Doyle Bagenall
also a Lt. William Cathcart Bagnall ( born Dublin, also served in Canada) listed 66th Reg of Foot 1813-1817
books.google.ca/books?id=dgUcAQAAIAAJ&pg=PA590&lpg=PA590&dq=Bagenall
1829 Ceylonrifle Regt 29th Foot -John Doyle Bagenall
http://books.google.ca/books?id=OEDzAAAAMAAJ&pg=PA772( a William and a George & Edmund also in Ceylon military
http://ceylondatabase.net/military.html)
Note HSR's loss of a son Endmund Wm
His arm was amputated after battle in 1809-
http://archive.org/stream/recordofeightyse00canniala/recordofeightyse00canniala_djvu.txtRobert Sedley, some children
https://familysearch.org/search/record/results?count=20&query=%2Bfather_givenname%3A%22robert%20sedley%22%20%2Bfather_surname%3ABagenall~also:http://www.napoleon-series.org/research/biographies/GreatBritain/Challis/Images1-50/027.pdf
another spelling if French origins could also be Baguenault
Interesting if your ancestry is Irish
http://catholicheritage.blogspot.ca/2011/04/mass-for-popes-birthday_16.html