Beginning in 1969 and continuing through the last two years of her life, Diane Arbus traveled regularly by bus to New Jersey to photograph people at residences for the developmentally and intellectually disabled. Her first destination, the coeducational Woodbridge State School, was just across the Hudson from her Manhattan apartment. Quite soon, though, she determined that an all-female institution in Vineland, in the southern part of the state, provided richer opportunities.

The photographs in the “Untitled” series, at the David Zwirner gallery through Dec. 15, are mostly taken in Vineland. Departing significantly from the work that built Arbus's reputation, they include some of the most mysterious and haunting pictures of her 15-year artistic career.

The “Untitled” exhibition is the first in Zwirner’s new partnership with the Fraenkel Gallery of San Francisco to co-represent the Arbus estate. Rather than start with her iconic portraits of sideshow freaks, cross-dressers, pro-Vietnam war demonstrators and nudists, the New York gallery opted to show this less familiar, late work, which until now has never been seen in its entirety.