VACAVILLE, Calif, Nov. 28 — Mass murderer Charles Manson, now in the tenth year of eight concurrent life sentences in the Sharon Tate killings, refused to appear before a parole board, insisting he “was treated as a fool” after his last hearing.

But he sent a seven-page scrawled letter and three pieces from a Monopoly game to the Community Release Board, which denied his parole Tuesday.

Last year, when he was first eligible for parole consideration, Manson delivered a four-hour monologue on his innocence but agreed he was not fit to live in society.

This year, his letter reiterated that he was innocent of the nine killings for which he was convicted.

“I broke no law,” he wrote. “I didn’t get my rights to begin with. I talked to your board once … and have been treated as a fool since.”

Moments before the hearing convened, a guard was sent to ask Manson once more if he wished to attend.

He refused, but asked the guard to deliver two Monopoly play $100 bills and a card that said. “Advance to Go, Collect $200.”

The three-member panel spent two hours reviewing Manson’s prison record, including psychiatric reports classifying him as a schizophrenic whose condition currently is in remission.

“We have reached a unanimous decision,” board member Frank Coronado said after the hearing. “The prisoner is found unsuitable for parole.”

“The prisoner would present an unreasonable risk of danger to society if released,” the board said, citing Manson’s lifelong history of violence that culminated in the “brutal and senseless killings” of Miss Tate and others in the summer of 1969, and his frequent discipline problems in prison. The board also said he had shown no efforts toward rehabilitation.

Manson, 45, like other prisoners in California, is given a yearly parole hearing. All convicted murderers are eligible for such hearings after they have served seven years in prison.

Lt. Gary Straughn, spokesman for California Medical Facility, where Manson is imprisoned in a high-security unit, said Manson has “been really pretty mellow,” and spends his time watching television, reading newspapers, writing letters and weaving little dolls out of threads he pulls from old socks.

By LINDA DEUTSCH