The Edward Harden Mansion, also known as Broad Oaks, is a historic home located on North Broadway (U.S. Route 9) in Sleepy Hollow, New York, United States, on the boundary between it and neighboring Tarrytown.

[1] Edward Harden had earned fame and fortune as the Chicago Tribune reporter who broke the story of Admiral George Dewey's victory in the Battle of Manila Bay.

It was used as a home for retired seamstresses and, in the middle of the century, sold to the local school district, which continues to use it as its main offices today.

The mansion is located atop a small hill on the east side of Broadway, adjacent to Patriot's Park, listed on the Register as the site where John André was captured during the Revolutionary War, exposing Benedict Arnold's espionage for the British.

[2] The main house itself is a brick-faced nine-by-five-bay structure, two and a half stories tall with dormer windows and brick chimneys piercing its hip roof.

[2] All windows on the seven bays of the main block's west facade are double-hung sash, 20-over-1 on the first floor (except for modern, narrower one-over-one on the northwest corner) and 15-over-15 upstairs.

In the center bay the entrance has its original stained wooden single-panel door with narrow pilasters and leaded glass sidelights and transom.

[2] In 1898, then 29-year-old Chicago Tribune business editor Edward Harden was riding along on the USS Hugh McCulloch, a revenue cutter, when it was summoned to join the Asiatic Squadron under the command of Commodore George Dewey, as the Spanish–American War broke out.

He was one of three reporters who witnessed Dewey's victory in the Battle of Manila Bay, the first by the U.S. Navy over a foreign fleet since the War of 1812.

From Hong Kong he was able to scoop the other two by paying the telegraph operator with a bag of gold to expedite the dispatch to his paper.

It reached the United States ahead of Dewey's official report, which had been sent first, and even President William McKinley found out when the Tribune's editor awoke him with the news.

The architects chose the new Georgian Revival style for the building, which was widely covered by New York and Chicago newspapers.

She had directed in her will that a large amount of money be used to purchase and maintain a home for retired seamstresses like those who had worked for her, an unusual idea at the time.

Ten years after the war, in 1955, the house was sold to the Union Free School District of the Tarrytowns, which converted it slightly.