James Murray born: 13 December 1869 Crockwady,Ballinamore,Leitrim parents:John Murray/Mary Prior
Thomas Murray born: 29 May 1871 Ballinamore,Leitrim parents:John Murray/Mary Prior
I looked for other children of this marriage and could find none so possibly Mary died after or in childbirth? I found 3 records for Mary Murray dying in county Leitrm about this time;1871,1874,1875.One of these may be your Mary.
Marriage: John Murray born:1845 age:22 father:James Murray Mary Prior born:1845 age:22 father:Barth Prior married on 17 February 1867 in Bawnboy,co Leitrim
birth of John Murray(father James); 1835,1837,1839,1849
birth of Mary Prior(no Barth on records): 1842,1843,1844,1846,1847,1849,1854,1855
I would say they were probably both born in 1849 and just said they were older so they could get around full age requirement.They both may have been 17 when married.
James MurrayCrockawaddyDrumreillyLeitrim James MurrayDrumcouraDrumreillyLeitrim
there were other James Murrays listed in co Leitrim but these two stood out as both fathers would be from the same parish.
I did find a birth for a Bartholomew Friar 1828 co Sligo and 1800(Bartholomew Friory) co Westmeath.Don't know if either may be Mary's father. Also,came across a birth for a Bartholomew Prior 1849 co Leitrim whose father is Andrew.Its quite possible Andrew and Bartholomew(Mary's father)are brothers. Lastly,I found a marriage record for a Catherine Murray for April-June 1888(she'd be 21) in Bawnboy,co Leitrim and thought perhaps that this is the sister of Thomas and James. Hope this helps,Kim