This edition of Quaker Geneologies nearly doubles the titles included in A Preliminary List published in 1974. What qualifies a book to be a "Quaker geneaology"? The rule of thumb has been that if the progenitor and the first generation were Quaker the title is listed herein. There are cases where a substantial section treats a Quaker family in a non-Quaker history. These works have also been included.