"You can track by bottle, " says Abbott Vice President John Landgraf .

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Another Biltmore distinction: Most of the items on exhibit, from portraits by Pierre-Auguste Renoir, James Abbott McNeill Whistler and John Singer Sargent to the crystal, porcelain and Flemish tapestries, are original to the house and the family.

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But John Kightley, managing director of money manager Maple-Brown Abbott in Sydney, points out two other reasons for Australia's long run of growth.

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