Prince's artwork raises charity cash

The print of Prince Charles's work sold for twice the expected amount

A print of a watercolour by Prince Charles sold for £5,500 ($10,062) in New York on Wednesday.

The picture of the Highgrove estate which sold for twice its expected value, was among several exhibits auctioned to raise money for a memorial garden for September 11 victims.

The site is being developed in lower Manhattan, near the site where the twin towers fell in 2001.

Sixty-seven Britons died in the attacks, the biggest loss of British life in a terrorist attack.

More than 300 people attended the black-tie gala dinner at Cipriani's on 42nd Street, Manhattan, paying a minimum of £150 ($275) each. Many guests paid much more than the asking price.

During the auction, guests also bid for a private tour of Highgrove, the Prince's Gloucestershire home, by landscape architect Julian Bannerman, which sold for £3,800 ($6,951).

An official Jubilee celebration photograph of the Queen and Duke of Edinburgh, by Lord Lichfield, was sold for £1,600 ($2,926).

Spokeswoman Peggy Brown described the charity auction as "amazingly successful".

Personal and corporate donations amounting to £135,000 ($247,000) have so far been raised for the trust.