Individually, Rosemary Clooney’s albums giving tribute to the great American song-writers of approximately the middle of the twentieth century seemed interesting, and even illuminating, as she subtly evoked the intentions of those writers by her straightforward delivery of their tunes. Little did the listeners of the six CD’s in Rosemary Clooney: The Songbook Collection realize at the time of their release in 1979 and throughout the 1980’s that a larger perspective enveloped the incremental growth of Clooney’s discography focused on a single theme.