I am trying to find any info available on my greatgreatgrandfather John Armstrong b. 12 Nov 1849 in Annan, Ontario, Canada. He was married to Elizabeth Cannon b. 29 June 1856. They had four children, Elizabeth, Robert, Helen and James. I do not have a marriage date on them, but their daughter Elizabeth was born 31 May 1880. I have come to a roadblock here and can't seem to find any information on these two. This information I have comes thru family info, and I am relying on their accuracy. I hope someone can help me with this.