The first thing to note about the collection of old-timey music Work Hard, Play Hard, Pray Hard is that it resulted from a record-discovery event that happens less and less often, and soon will likely never happen again. The music was recorded between 1923 and 1936. Most of the sides on the set are taken from 78s collected by the late Don Wahle of Louisville, Ky., and rescued from Dumpster destruction in 2010 by compiler Nathan Salsburg. Nineteen of the songs have never been reissued. Piles of moldy vinyl left behind by the deceased were once commonplace. No longer.