Certain black-letter days in the life of William Penn This book, "Certain black-letter days in the life of William Penn", by Frank Willing Leach, is a replication of a book originally published before 1917. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.