Church/civil B/M/D rcds for Laois and Offaly were recently transcribed and put online.
For Bart(le) Whelan B after 1877, Co. Laois, with the father's forename unknown, I found a "Barthelemew" (likely a misspelling or transcription error), 1879, Portlaois RC parish. Father's forename was Pat. A view of the B rcd SHOULD show the mother's name.
For Pat Whelan M 1875 +/- 4 yrs, Co. Laois, I found 7 rcds: 1871, 1872, 2-1873, 1876, and 2-1879.