My GG Grandfather Philip Clements married my GG Grandmother Esther O'Rourke 10/1880 at St Andrews in Dublin. Philip's address reads Beggar's Bush Barracks. I google mapped the place and see what it looks like and found streets on both sides of the "Square" were West and East Cannon Mews. I got a list of units in Dublin in 1880 a few were Royal Horse Artillery but does not give exact location. I assumed because of the street names it was the Royal Horse Artillery. There were several places used at that time. One being Dublin Castle. When my G Grandmother Catherine Clements (6/1881) was baptized at St Andrews the address is listed as 12 Shoe Lane. It does not exist anymore. Any place I can go to find out what unit my grandfather was in. On marriage entry at St Andrews the column titles were in Latin one I assume was birth place and it had "Yorkshire" Any help I would appreciate it.