Clinton Hill or Clinton Hills?

If I had the Encyclopedia of New York City handy, I would quote that. But since I don't, wikipedia will have to do:

"Clinton Hill is a small neighborhood in north-central Brooklyn, New York. It is bordered on the east by Bedford-Stuyvesant, on the west by Fort Greene, on the north by Wallabout and on the south by Atlantic Avenue or Fulton Street.

By the 1840s, Clinton Hill had become a fashionable neighborhood for the wealthy of Brooklyn, who could commute to Manhattan by way of stagecoach to the Fulton Ferry in nearby Brooklyn Heights. By the 1880s and '90s, Clinton Avenue was lined with mansions of millionaires, many of which have survived to the present day. The most prominent of these are linked to Charles Pratt, who built a mansion for himself and one each for three of his four sons (pictured, right). These four mansions can be seen on Clinton Avenue between DeKalb and Willoughby. The Pratt Institute of Art, founded by Charles Pratt in 1887, is located a few blocks from his former home."

http://query.nytimes.com/gst/fullpage.html?res=980DE7D81E39F931A35752C0A9669C8B63&sec=&pagewanted=print

"ONCE farmland, Clinton Hill got its start in 1832, when the main boulevard was laid out. It was named for De Witt Clinton, who had been both mayor and governor.

In 1874, Charles Pratt, an oil magnate and a partner of John D. Rockefeller, built himself a mansion at 232 Clinton Avenue, then built four more as wedding presents for his sons. Three remain. The leafy promenade gained a reputation as the Fifth Avenue of Brooklyn, or Millionaire's Row.

Early in the last century, apartment buildings replaced some of the grand houses, and brownstones were divided into rooming houses."

It is Clinton Hill.[/b]

i always figured it was confusion from the neighborhood "Cypress Hills" which definitely is plural.

the question remains, where's the hill?