At 1735 yesterday, a tall slim stooping figure in a turned down college boy hat slipped out of the rear door of the Harbor Sanitarium, 667 Madison Ave. The figure held an animated conversation in the alley with a person who later turned out to be his valet. Then the figure darted nervously into a 15 and 5 taxicab and was whisked away. Thus, Barclay Warburton Jr, host to Rudolph Valentino at that mysterious party, leave the sanitarium where he underwent an operation only a few days after that of his famous guest. Everyone at the Harbor from the superintendent to the doorman tried to keep Warburton’s departure a secret. The young society man plainly looked ill as he left. Meanwhile Broadway, astir with reports about Rudy’s illness was still wondering about the speedy retirement of his host. After giving out a statement that there was no party at his apartment 925 Park Ave a story contradicted by at least one guest apartment owner Warburton has frantically dodged questioners. Warburton’s story told immediately after Valentino was taken to the hospital, was that Rudy was taken ill at the Ambassador Hotel and not after the party at Warburton’s. Harry Richman of the cast of George White’s scandals, said Rudy, Warburton, and himself, accompanied by three women, went to Warburton’s apartment. “We had some drinks, music and dancing” Richman said, until about 1:30, when Rudy was taken violently ill and was rushed to his apartment at the Ambassador. While his death mystery deepens Rudy lay in peace yesterday in the gorgeous gold room at Campbell Funeral Home.