Granger lineage

I am trying to link the Granger line as follows:

Andrew Jackson Granger from Henry Granger from Harmon Granger From Zarah Granger from Elisha Granger (married to Mary Prentice) from Elisha Granger (married to Sarah Pierce) from John Granger.  I cannot find the actual link between the two Elishas to confirm the line from that point on.  Do you have any info to help fill this in?  Thanks.  S