For historic photographs by Morris Huberland, see The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library, The New York Public Library Digital Collections:
Beit Midrash in the basement:
Mendelsohn, Joyce. Lower East Side Remembered and Revisited: A History and Guide to a Legendary New York Neighborhood. 2nd edition (New York: Columbia University Press, 2009), p. 101.
Wolfe, Gerard R. The Synagogues of New York’s Lower East Side, 2nd ed. (New York: Empire State Editions, 2012), 35-42.