Hi, glamwales,
Here's the entire certificate transliterated for you:
1848. Marriage solemnized at the Parish Church in the P(a)rish of Merthyr Tydfil in the County of Glamorganshire
No. 11
When Married: Augt 1st 1848
Groom: Thomas Edwards full age, widower, Collier, residence Penheolgerrig, father: Thomas Edwards, Farmer
Bride: Jennett Harris full age, widow, no occupation, residence
Penheolgerrig, father John Davies, Collier
Married in the Parish Church according to the Rites and Ceremonies of the Established Church, by or after Banns by me, William Rowlands Curate
This Marriage was solemnized between us, Thomas Edwards, Jennett Harris by X Mark
in the presence of us W. Rowland
Daniel Williams by X Mark