I have located two primary source documents about Peter Yarnall that have helped me with my Worrilow line.
1.LDS microfilm 0432021Chester monthly Meeting Minutes (1681-1721) page 191, the minutes state that: ProvidenceMeeting:Peter Yarnall's marriage reported orderly."the date on the previous page is 2-25-1715
2.LDS microfilm 0020854 Chester Co PA Deed Book E 1730-1739 Deed Book F 1738-1745 Deed located on page 377-380This is a release of property. All of the children of John Worrilow are listed with their spouses.Peter Yarnall, husband of Alice. This is the only place that I have found the proof naming Alice as daughter of John Worrilow and his wife Ann Maris.
so if anyone else needs the information, there it is.