I got your message on the Genealogy.com forum or on ancestry.com (but can not respond as I am no longer a member there). So please send any replies direct to my email address.
Yes, I am the Mike Simpson who posted my tree there many years ago. I have not been doing much work on my genealogy for some time, but can send you a Gedcom file with all my Marriner data if that is of use to you. Please respond to my email address.
I think you may have an error in your research, Sarah Marriner born 1823 is the granddaughter of Matthew Marriner born 1743 (he would have been 80 years old when Sarah was born?)
Best Regards, Mike Simpson Penrith, NSW, Australia