Relatively instant karma, I suppose. I was hoping more for links than more research, but the Lord surely doesn't give us more than we can handle, eh?
I have Mathias Jarvis and, until your posting, he was only married to "Mary". Thank you for the additional details. I show Mathias and Mary with four issue: John b:1848, Mary b:1853, Henry b:1857 and Sarah b:1859, but I don't have anything further. Any chance of getting their lineage? You're cordially invited to email me directly at firstname.lastname@example.org