“The Getty Trust, one of the world’s richest cultural and philanthropic organizations, said Friday that David P. Gardner, a former chairman, had agreed to repay approximately $99,000, or about half of the compensation he had received for work on an unfinished book commemorating the trust’s 25th anniversary. The book contract, which was canceled in March, is thought to be part of a continuing investigation by the California attorney general’s office into allegations of financial improprieties at the trust.”