Thank you for the information on the Groscost/Decker connection.At your suggestion I am looking at the other resources you cited.
Sophia Groscost is my wife's 3rd great grandmother and I've been researching her family along with my own (both have roots in PA, though my 5th great grandfather, a U.E. Loyalist, after being released from gaol because he was allegedly ill, fled to Canada with his and several other loyalist families in Fayette Co.)
I do have the Percy Decker book, which has been quite helpful but also somewhat confusing regarding Sophia/Christian Groscost.
I would very much appreciate any additional information you have regarding the Groscosts/Bowsers.