Found: 1850 Marriage Record of Denis and Maria

OMG, I found Denis and Maria's marriage record from Ireland!!
Ireland Marriages, 1619-1898

Groom’s Name: Denis Ohagan
Bride’s Name: Maria Corr
Marriage Date: 15 Jan 1850
Marriage Place: Tullaniskin, Tyrone, IRE
Groom’s Father’s Name: John Ohagan
Bride’s Father’s Name: John Corr
Indexing Project (Batch) Number: M70202-5
System Origin: Ireland-VR
Source Film Number: 101316
Reference Number: 2:3PCJ2X1

Newmills in Northern Ireland

Here's a link to the town of Newmills in Northern Ireland where Denis O'Hagan lived with his parents John and Rose O'Hagan. Newmills is located near Dungannon.

Roman Catholic Churches near New Mills around 1850

I found 2 Roman Catholic Churches near New Mills where the O'Hagan family lived in the 1850s: Coalisland and Stewartstown (Armagh diocese) or Donaghenry and Ballyclog (Coalisland) (Armagh diocese).

This is from An Irish Geneological  Source - A Guide to Church Records published by PRONI (Public Records of Northern Ireland) that also includes dates of records kept.
(p. 171-173):R.C. Coalisland and Stewartstown (Armagh diocese)
Baptisms, 1861-80; marriages, 1862-79; deaths, 1861-8. MIC1D/34


R.C. Donaghenry and Ballyclog (Coalisland) (Armagh diocese)
Baptisms, 1822-40 and 1849-81; marriages, 1822-41 and 1853-80; deaths, 1822-39 and 1854-69. MIC1D/8, 34

John J. O'Hagan

I found this link that decribes a newspaper article in Newberry Observer about John J. O'Hagan . I had heard that he drowned at the Georgetown, Lighthouse, but he drowned at Sullivan's Island.

"O’Hagan, John J. who for 30 years was lighthouse keeper for Charleston Harbor fell into the water at Sullivan’s Island and drowned, Observer 10/1/1909, page 1"