More than 2, 000 people visited Hull's Ferens Art Gallery last weekend to see David Hockney's biggest painting to date, Bigger Trees Near Warter.

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Brenton Simons, president and chief executive of the New England Historic Genealogical Society, said renderings of family trees date at least to the 18th century in the U.S. and stretch back centuries before in other countries.

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Here, an abundance of free-flowing freshwater springs support hundreds of thousands of olive and fruit trees and date palms, which also shade and cool the valley's mudbrick villages as they rest concealed in the greenery.

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The Lord's Acre appears to have remained an orchard and kitchen garden to the castle's occupants for around 350 years, and many of the fruit trees there date from between 1300 and 1600.

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In recent weeks Ms. Dunn has planted two Chinese Jujube trees on tricky cliffs flanking each side of the driveway, which in a few years will produce exotic date-like fruits.

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