Today's Vinyl Vault track hardly ever gets played on rock radio anymore but once did, plenty.  When the handful of Zeppelin BBC gems were first unleashed to radio during the 1970's, we were all over them like they were new releases.  Heck, they seemed new because hardly anyone had ever heard them.  One, a bluesy acoustical romp called Travelling Riverside Blues, finds the boys in great form on June 24th, 1969.  Enjoy!  Out of town?  Listen live on-line.