We know very little about Phillip, except that he was willed by David Sr. to David Jr. in 1813. There is no record of Phillip in the 1844 estate sale of David Jr., meaning he likely passed away or was sold before the auction.
Like Phillip, Moses is listed in David Sr.’s 1813 will, but was given to Priscilla rather than David Jr. Since Moses does not appear in Priscilla’s 1835 will, he likely passed away or was sold before her death.