Over the first two volumes of Manhattan Soul, Ace Records' Kent imprint has dug up some of the finest - and indeed, rarest - soul tracks to come out of the Big Apple in the 1960s. For the third installment of the series, the label has again tapped the vaults of Florence Greenberg's Scepter and Wand Records, plus rival label Musicor, for a definitive chronicle of some of the most urbane R&B of the decade. Though these outfits were based in New York, productions sometimes came from other