1931
Manhattan: Central Park - Reservoirs - Lower reservoir.
(1) Central Park: Lower Reservoir, eastern side, view northeast, showing work of levelling of the old eastern embankment. June 28, 1931. P. L. Sperr. (2) The same, a detail of the work. June 28, 1931. P. L. Sperr.
Photo from the New York Public Library - Milstein Collection
