I think I found John Flynn's RIC record. (findmypast.ie). He had Service No 2856, enlisted at the age of 20, from Galway, on 15th July, 1837. He was assigned to Westmeath. He was promoted to Constable on 1st August 1847. He retired on 1st June 1868. He also married, with permission, a woman from Meath.
However, while we think at the moment they were married in 1849, the permission was only given in 1850. Would this ever have been retrospective, or have I the wrong guy? All other details seem to fit.
