I found a photo of my grandfather and sent it to Chris Halpin. He put me in contact with my first cousin Debbie Trotter. She was able to track down information and obtain her Irish citizenship.
There's a handwritten Birth and Baptismal Certificate that says Thomas Halpin was born on November 24, 1881 and was baptised in the Church of St. Michael, parish of Castlepollard, on November 25, 1881.
I’m hopeful to get a copy and start the process for my citizenship as well.
Exciting news!