Re Tom Robbins's article on Harry Ryttenberg ["The Trouble With Harry: Pataki's Wannabe Cop Gets Nailed," February 6]: With the disclosure that I'm a friend of Ryttenberg's, I have to take exception to a recurring theme in the piece. Robbins made repeated references to Ryttenberg's health problems, stating that he had "long claimed poor health" and adding that former police commissioner Howard Safir believed "Ryttenberg concocted his health problems." While I can't comment on Ryttenberg's legal situation, I took him to the hospital and visited him in coronary care units. Many times, I feared he wouldn't be alive the next day. His survival is due to perseverance, luck, and some top-notch medical care.