Letter from Isaac Leeser to Jr. J.S. Cohen;September 01, 1857 Letter from Isaac Leeser to J. S. Cohen, Jr. in Baltimore, sent from Philadelphia on September 1, 1857. Leeser informs Cohen that he has sent a set of prayer books as ordered and includes six Daily Prayers requested by Mr. Carvalho. He also invites Cohen to the dedication of their place of worship on Thursday evening of that week.