West Galway birth and marriage records prior to civil registrations in 1864

SInce Rosmuc, Oughterard, and Killanan parishes are nearby, I am hoping someone who sees this message might have some insights or information to continue my research.

I shared this information with Sinead who suggested I post here and has provided some suggestions. 

Patrick was born about 1830-32 and Catherine was born about 1837.    It appears they were married around May-June 1856.

I've been to the National Library and looked at the Rosmuc film.  There are no marriage records for Rosmuc.  So then where would they have been married?  Kilcummin Oughterard?  I know little about Killanan parish.  I've also been to the Galway Family History Center West.  Both last July.  Not as much time as I'd like to spend but received some useful information.  We know the oldest daughter Mary was baptized in Rosmuc just prior to immigration to the U. S. in 1858.  She was baptized on 3 Mar 1857 in Rosmuc.  I assume for now her actual birth was maybe Feb 28, 1857.  Then that Patrick and Catherine were married on or before date of conception which would have been about 7 June 1856 which was a Saturday.  A traditional marriage day but maybe earlier?  Patrick "Holloran" married Catherine Lydon and John "Holloran" married Mary Lydon.  There is another Patrick Halloran in Illaneragh married to Barbara Keely who had a child in 1864 baptized in Lettermore.  (No parish there but appears in civil record.)  Assume this is a cousin but it is not the same as my Great Grandfather.  I have a family tree on Ancestry.com under Patrick Hollarn.  (Our mispelled name was retained but family knew later it should be Halloran or Holleran as it was sometimes recorded.)

FYI, I also have some Kilcummin Valuation of Tenements pages (16, 30, 32, 33) for the area but it doesn't sort out who is who very well or whether John Halloran for example had more than one property as a John Halloran is listed in a couple of places. And what is the relationship to Hugh Halloran?  Puzzles for sure.