This third volume in Rounder Records' ongoing classic-train-song series focuses on the R&B end of the rails. Its scope is perhaps a little too ambitious, since the selections here span nearly 70 years. Amid some pretty timeless competition, 1990s entries from the Holmes Brothers and Linda Tillery sound even more flatly digital (and surprisingly inanimate, given the subject matter) than they might otherwise. But classics like Louis Jordan's "Choo Choo Ch' Boogie" and Little Junior Parker's original recording of "Mystery Train"--which predates Elvis Presley's earth-shattering cover by a full year--give this volume a propulsive swagger that previous bluegrass- and country-centric volumes in the series lack. --Matt Hanks