Timothy Shea

I am looking for help in finding any information on my great grandfather Timothy Shea. Baptized April 19, 1869 in Kenmare parish. Parents are Jeremiah Shea and Julia Foley. I know he came to Canada and married Mary Hynes both age 18. They had 4 children. Timothy left his family to work on boats travelling back and forth between England and Canada. One time he never came back. After 7 years Mary applied to have him officially dead, but apparently he was notified, and he wrote to Mary saying he was very much alive. That is the end of my story on Timothy. So many unanswered questions. Did he perhaps start another family in England or Ireland? Some say he worked on a cattle boat and everyone drowned. Lots of stories but no facts. If anyone could find anything relating to my mystery man, I would be forever grateful. Thank you. Barb Markle