Seeking Information on GGM Bridget Smith Cargagh Cavan (Lavey)

I'm having trouble finding information on my husband's great grandmother. I haven't found her baptism or death record. She was born Bridget Flood. 

She and Andrew Smith marry July 24,1870 in RC Chapel of Lavey in County Cavan. It was a second marriage for both and they resided at Carriga/Cargagh. She was a widow Smith so her first husband's name was Smith too.

If she was age 44 at marriage she'd be born about 1826. Her father's name had to be Patrick Flood (not Smith as written). 

Children found so far: 

• Ellen Smith born 1872 (Civil record confirms her maiden name Flood)
• Cornelius Smith born 1875 (Civil record)-My husband's grandfather
• Mary Smith born after 1875 ?  (listed on 1901 Census.; Haven't found her Civil birth record or what happened to her)

Bridget Smith is a witness to her step daughter's Susan Smith's wedding in Feb. 1879 if this is her.

Her husband Andrew Smith is widowed and age 77 on the 1901 Census in Cargagh, Cavan. 

Can't locate:

Bridget Smith death Cargagh, Cavan 1879-1901

Bridget Flood's first marriage before 1870 to another Smith

Her baptism, father Patrick Flood, or townland she was from.