I found a possible index cross match for the marriage of Mary and Patrick - with a phonetic spelling for his surname (could possibly indicate he was illiterate) :
Name: Patrick Huit
Registration District: Nenagh
Event Type: Mariage
Quarter and Year: 1874
Volume : 8 / Page : 423
Name: Mary Cleary
[same index details]
You can use the references to order a research cert by post from the GRO - see :
www.groireland.ie A cert will show further information such as name of church, exact date of marriage, occupation, residences of bride and groom, father's names.. etc..
Shane