IT was on a Sunday morning, June 13, 1971, that The Times published its first installment of the Pentagon Papers. Few readers may have been more excited than a circle of aspiring undergraduate journalists who d worked at The Harvard Crimson. Though the identity of The Times s source wouldn t eke out for several days, we knew the whistle-blower had to be Daniel Ellsberg, an intense research fellow at M.I.T. and former Robert McNamara acolyte who d become an antiwar activist around Boston. We recognized the papers contents, as reported in The Times, because we d heard the war stories from the loquacious Ellsberg himself.