Diane in reading through the book I came across Elizabeth Cassel no birth dtae dau. of a Johannes Cassel b.1639 Kriesheim came to Phila. aboard the "Jefries" in Nov 1686 with wife Mary, settled in Germantown(presumed by the author to be son of Yellis) They also in addition to Elizabeth had, Arnold b. 1670, Daniel, Nicholaus, Veronica, Susanna. No spouses for Peter or Elizabeth and Susanna. Arnold Cassel from above married Susanna de la Plaine in 1693, they had a dau. Elizabeth too, but no date of birth for her or name of spouse. Do not know if this has anything to do with the Elizabeth you are looking for, but thought I would pass it along anyway. The dates fit your Elizabeth. There are some very interesting family stories in this book, but I do not know how reliable it is. Peg