Charlie Bowman wrote both "Nine Pound Hammer" and "Roll On Buddy, Roll On"...as well as "east Tennessee Blues"...I know because I have recordings of both songs and they both date back to 1927....plus he was my great grandfather...if youd like more info on charlie...email me at ssadler_2003@yahoo.com merle travis covered "Nine Pound Hammer" yes, so did countless others, heck someone even named their band NPH lol oh well