Letter from Isaac Mayer;May 03, 1857 Letter from Dr. Isaac Mayer of Rochester, NY, to Eliesar Isaac in Philadelphia, PA, dated May 3, 1857 (Iyar 5617). Mayer discusses a new edition of his Hebrew grammar, requests six catechisms, and comments on contemporary religious reform movements, particularly criticizing Reform Judaism in Baltimore and Cincinnati. He also mentions a successful public school examination and Passover sermons he delivered.