The portions of the village on Harbor Hill, in Clarence Mackay's former estate, are among the highest areas in Nassau County.

John William Mackay - Clarence Mackay's father who died in 1902.

Because of religious convictions, Clarence Mackay would not remarry as long as his first wife, Katherine, lived.

Clarence Mackay was a noted collector of medieval suits of armor, some of which he sold to the Metropolitan Museum of Art in the early 1930s.

Both stadiums were named for Clarence Mackay, a university benefactor in the early years of the school.

Clarence MacKay bought Meddler for $51,000 at the dispersal sale of William Collins Whitney's horses.

The house was originally a component of Clarence Mackay's Harbor Hill Estate.

Her father, Clarence Mackay, the telegraph tycoon, disinherits his daughter and she's erased from the Social Register.

Still, Clarence Mackay claimed that his nearby house, Harbour Hill, was higher.

Clarence Mackay, a music-loving telegraph magnate, engineered a merger with the rival National Symphony and came out on top as chairman.