“Since its inception in 1991, The Bootleg Series of Bob Dylan has evolved to the point where each successive release has become distinct and complete unto itself. Yet Vol. 15  is something of an exception to that rule because its contents abuts chronologically with The Complete Basement Tapes and, even more directly, with Another Self-Portrait. The three-CDs or LPs posit the Nobel Laureate continuing the musicological expeditions of those two aforementioned periods, reacquainting himself with a variety of styles in order to choose the optimum means of expression for himself as a songwriter. The content does not posit him as ‘the voice of a generation’ or the position of cultural bellwether he inhabited the prior decade, so there’s a certain kind of profundity is missing here (unless hearing Bob yodel qualifies: he does so on one of the ‘Jimmie Rodgers Medley’s). The cachet of Travelin’ Thru, 1967 – 1969