Upper Canada Marriage Bond of Richard Beamish and Mary Ann Reynolds, show that they are both living in Ops Township (Victoria County)next to Cavan.
View Image Name of Future Husband:BEAMISH, Richard Residence:Ops Township, Durham County Name of Future Wife:REYNOLDS, Mary Ann Residence:Pps Township, Durham County Reference:RG 5 B9 Volume:38 Bond Number:6882 Date:1839-02-23 Microfilm reel number:C-6788 At : http://www.collectionscanada.gc.ca/databases/marriage-bonds/http://www.collectionscanada.gc.ca/databases/marriage-bonds/
If you view the image you get the original which contains more information.
On 1881 County Atlas of Ops Township, there is still a William Reynolds living in Ops Township. He has been there since 1831:
Full record for Reynolds, William Last Name Reynolds First Name William Dates b. 1811 Nativity Tipperary Co., Ireland Business Farmer; Postmaster Year Settled 1831 Post Office Mount Horeb Township Ops County Victoria Atlas Date 1881
I believe that your Richard is probably a son of William Beamish who was granted land in Cavan Twp in 1822, per Upper Canada Land Book.He had 6 children in 1822, and went on to have 13.He was from County Cork, possibly Skibbereen.