The newspaper notice of the marriage is perhaps more reliable that the information given so far (Emerald Ancestors, etc. but the actual certificate would need to be checked.
Londonderry Sentinel. 18 Jan.1856 "At Draperstown Church, on the 8th inst., by the Rev. S. Montgomery, Rector, Henry, second son of Mr. J. Orr, Moneygulggy, Draperstown, to Margaret, eldest daughter of the late Mr. John McCleland, Dirnascallon, Desertmartin."
Think Moneygulggy is either misprint or mistranscription for Moneyguiggy and Dirnascallon should be Durnascallon.