Ruth, I haven't found anything about john and marjory, and have only gotten back as far as Joseph's parents.(Actually thats ok with me, because I was really only planning to go back several generations on as many lines as I could, so my kids would have some family info.)
I guess all the Bartletts are stuck at the road block of Josephs parents.I found a great site that has all the info I had and lots more on his line at:
If you haven't been there before, just go to the bottom of the page and click on "Lineages".Go to the bottom of that page and click on "NATHAN, JOSEPH and JOSHUA BARTLETT of Tennessee".
There was so much info, I printed it all out to keep with my family papers.I'm so glad that they went to all the trouble to put up a website with so much wonderful information.It was sooooo easy to add to the stuff I had, I guess I'm spoiled for the rest of the 'real' digging! :o)