Cover of I GOT THE FREIGHT TRAIN BLUES in 1936 - as Freight Train Blues; vocal: Sam 'Dynamite' Hatcher; Roy just provided the steam whistle effects; his own first vocal version was cut in '47, his hit version's from '65
Cover of I COULDN'T HEAR NOBODY PRAY in 1942 - as Wreck On The Highway; in '72 again with The Nitty Gritty Dirt Band on their Will The Circle Be Unbroken project