Nothing like being a little late responding LOL I think there is a "good chance" the James Murdock buried in the Forkhill cemetery, was the father of my Margaret (Murdock) Forde AND her brother Charles L. Murdock (b. ca 1793 Co. Armagh). He too immigrated to Canada. Can you suggest any other available records for me to look at? Margaret and Charles' father is said to have been Capt. James Murdock who fought in the 1798 Irish Rebellion.
Also, I took a look at your family site and if interested, I have some additional information for the Joseph Murdock you have listed b. 1813; d. 1880 Perth, Lanark, Ont., Canada.