Letter from Sigismund Waterman to Isaac Leeser, July 19, 1849 Two-page letter written by Dr. Sigismund Waterman to Isaac Leeser on July 19, 1849, in New York, New York. Waterman sharply criticizes Leeser's personal attacks and handling of debate, questioning Leeser's journalistic ethics and fairness. Waterman, the first Jewish medical graduate from Princeton, discusses his role as translator and future plans. The letter is marked as strictly confidential.