Marriage took place in St. Guaire's Church of Ireland but groom's residence is written as Incha in the register (not Inchadoshire as on Bann Valley website transcription). Could be Inchadoghill or Inchaleen. Groom's surname is McQuillen.
Mary Jane Boyce's residence is given as Cashill and her father as Matthew Boyce, labourer. Did find record of a Matthew Boyce, weaver, of Maevemanogher, married 8 Jan.1851 Coleraine Registry Office to Eliza Young. Matthew was bapt. 14 July 1822 First Garvagh Presbyterian Church, son of Robert Boyce. Not sure if this Matthew is the father of Mary Jane Boyce.
Checked 1831 census and no McQuilken (or any variation) in Inchadoghill but not surprised because Thomas was a labourer and the family could have moved around quite a bit. Also not listed in Inchadoghill in 1833 Tithe Applotment list.
If you have any more details let me know and I'll do a bit more searching in my files.