Conniver was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 Thoroughbred

Thoroughbred

The Thoroughbred is a horse breed best known for its use in horse racing. Although the word thoroughbred is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed...

 racehorse

Horse racing

Horse racing is an equestrian sport that has a long history. Archaeological records indicate that horse racing occurred in ancient Babylon, Syria, and Egypt. Both chariot and mounted horse racing were events in the ancient Greek Olympics by 648 BC...

 who was voted the 1948 American Champion Older Female Horse. Bred by Alfred G. Vanderbilt II

Alfred G. Vanderbilt II

Alfred Gwynne Vanderbilt II was a member of the prominent Vanderbilt family, a son of the first Alfred Gwynne Vanderbilt who died a hero in the sinking of the RMS Lusitania. His mother, Margaret Emerson, was one of America's wealthiest women and most sought-after hostesses, operating at least...

, she was purchase as a yearling by New York City

New York City

New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 businessman and sculptor, Harry La Montagne.

When her racing days were over, Conniver was used as a broodmare. Of her six foals, Clandestine and Plotter won important American Graded stakes race

Graded stakes race

A graded stakes race is a term applied since 1973 by the American Graded Stakes Committee of the Thoroughbred Owners and Breeders Association to thoroughbred horse races in the United States and Canada to describe races that derive their name from the stake, or entry fee, owners must pay...

s.