The trial continued Thursday in a lawsuit brought by three trustees of the Robert Rauschenberg Revocable Trust, who are suing the artist's foundation for $60 million in fees for services rendered.

The worth of Rauschenberg's work was again the focus.

The trustees are Bennet Grutman, who was also Rauschenberg's accountant; Darryl Pottorf, close friend and companion and executor of the artist's will; and Bill Goldston, who partnered with the artist for a fine art print publishing company.