by Bruce EderThe Four Freshmen were one of the top vocal groups of the 1950s, and formed the bridge between '40s ensembles like the Mel-Tones and harmony-based rock & roll bands such as the Beach Boys as well as groups like Spanky & Our Gang and the Manhattan Transfer. The group's roots go back to the end of the 1940s and a barbershop quartet-influenced outfit called Hal's Harmonizers, organized at the Arthur Jordan Conservatory of Butler University in Indiana by two brothers, Ross and Don Barbour. Their repertoire centered on standards such as "Moonglow" and "The Christmas Song," and they began to show an unusually free, improvisational approach to their harmony singing. A couple of membership changes brought Bob Flanigan, a cousin, into the fold alongside Hal Kratzsch, and suddenly the Four Freshmen were assembled in all but name, and that fell into place a little later. The group struggled for a long time, living hand-to-mouth while build...