The attached picture is of my great great grandfather. I am trying to identify the uniform, its ensignia and embellishments and if they are indicative of rank, a regiment etc. I am told he was from Ulster (late 1700's to mid 1800's) and immigrated to Canada in 1833. Not shown in this picture is a cap badge that has a "hand" on it? Any clues? Any and all help is greatly appreciated.