Unfortunately I don't think the 2nd cousins will help. The information that Ben gave was this: Nicholas Bowlus & Catherine Orndorff had 2 sons:
Samuel L and Stephen (brothers) Samuel m/Mahala Gaver and Stephen m/Ann C Remsburg Samuel's d/Emma and Stephen's d/Eliza were 1st cousins Emma m/John D. Whipp and Eliza m/Henry Biser Emma's d/was Nannie and Eliza's s/was Maurice Maurice and Nannie married
Nannie's sister was Nellie Whipp the mother of Ben which is where I rec'd this information.
The 10 children listed are listed as the children of David & Mary Gaver.
The 5 - Catharine, Elizabeth, Susannah, Esther and Eve are listed as siblings of Mary (Biser) Gaver
My notes state that the will was filed 10-20-1817 but only a portion of the will was presented.
I will keep searching through Ben's letters and notes he sent and see if anything else jumps out at me as I have not worked on this side of my family for quite some time.