"Lonesome Reuben" is a "traditional" song, meaning it has no established author, generally as a result of pre-dating substantial copyright records. Tony Rice recorded the most famous version of the song on his 1973 album "Guitar."
"Traditional" songs, such as "Lonesome Reuben," are common among country, blues and bluegrass songs. These songs, many of which come from British folk traditions, have their roots in styles dating back centuries and are thus difficult to attribute properly. In addition to Tony Rice's version of the "Lonesome Reuben," acts such as Sleepy Man Banjo Boys and Randy and Earl Scruggs have performed it.