The Israel who d. in 1800 is the one who m'd HULDAH TOWNE, not Hannah Mann! They lived in Oxford and Ward.
I think this line is covered in "Ancient Phillips Families." He was son of Joseph  Phillips, Theophylis , Rev. George 
For other children I have: Martha b. 24 Sep 1763, Simon b. 6 Jan 1766, John b. 2 May 1768, Israel b. 7 Apr 1771, Rufus b. 31 Aug 1773 and Daniel b. 1 Mar 1776, prob. all in Worcester Co. MA. I also have notes that Simon m. Rebecca Scott, Israel m. Mercy Bascom and Rufus m. Dilla Pitts.