The collection contains material relating to Meyer Landsberg of Hanover, Germany, his son Dr. Max Landsberg of Rochester and Miriam Landsberg, the wife of Max Landsberg. There are twelve notebooks of sermons, one undated and the others from 1851-1868. Two biographical folders, Mrs. Miriam Landsberg and Max Landsberg; a Secretarial Report of Meetings of Alumni of B'rith Kodesh (1894); and a folder of untranslated notes and other miscellaneous material.

This collection documents the development of Rochester, the influence of World Wars, and the rise of radical reform through the efforts of Isaac Mayer, Susan B. Anthony, Willam Warfield and Stephen S. Wise. Included in the collection are financial and marriage reports. It includes writings by Rabbi Wolf and Rabbi Bernstein with travel diaries of Simon N. Stein.

The papers of David Rhys Williams contain correspondence, manuscript sermon notes, speeches, prayers, meditations and tributes, newspaper clippings, church bulletins, church membership and mailing lists, Forum material, church publications, articles by David Rhys Williams appearing in journals such as The Christian Register, Unity, The Churchman, Advance, The Christian Leader etc., printed and manuscript material on his three published books, a few books from his personal library and a composite list of books contained in his library (since dispersed), a few portraits, photographs and sketches, documents and memorabilia, a tape recording of his tribute to Albert Einstein and over fifteen hundred numbered sermons with cross references to other related sermons - all relating to his career as a Congregational and Unitarian Minister. Some of his correspondents were John Haynes Holmes, Frederick May Eliot, Steven Fritchman, Frank Gannett, the Beacon Press, Corlias Lamont, Kenneth B. Keating and Justin Wroe Nixon, and Philip S. Bernstein.