"Travelling Riverside Blues," sometimes called "Mudbone" or "Mud Bone," is a blues song written and recorded in Dallas, Texas by the bluesman Robert Johnson. Johnson's June 20, 1937 recording has a typical 12 bar blues structure (though as is common in downhome blues of this era, the length of each verse is in fact thirteen-and-a-half bars of 4/4), played on a single guitar tuned to open G, with a slide. It was first released on the 1961 compilation LPKing of the Delta Blues Singers. The song has proved popular with more recent blues musicians.
The song is well known for the lyrics:
"I want you to squeeze my lemon
until the juice runs down my leg."
The song was made internationally famous by the band Led Zeppelin, whose version of the song is most known to modern listeners.
It is quite different from the original, and it is more a tribute to Robert Johnson than a straight cover. The song showcases a riff by Page (also in open G tuning), and in the lyrics Robert Plant quotes many Robert Johnson songs, such as "She studies evil all the time", from "Kind Hearted Woman Blues", and "Why don't you come on in my kitchen", from "Come on in My Kitchen" (which is heard during the song's solo). Conversely, parts of Johnson's "Travelling Riverside Blues" are used as lyrics in Led Zeppelin's "The Lemon Song", namely the "squeeze my lemon" sequence. It is likely that Johnson borrowed this himself, from a song recorded earlier that same year (1937) called "She Squeezed My Lemon", by Roosevelt Sykes. The line "she got a mortgage on my body, got a lien on my soul" and reference to "front teeth lined with gold" at the end of the song are also from Johnson's original.
It was interest from US radio interviewers and fans during Page's Outrider tour that originally led him to negotiate with BBC Enterprises for the song's release. A promotional video clip was also released in 1990, with out-take footage from the band's 1976 concert film, The Song Remains the Same inter-spliced with other footage from the band's archive. The clip also features a railroad montage, and underwater shots of the Mississippi River. The song reached number seven on the Billboard Top Rock Tracks Top 50 chart in November 1990, culled from national album rock radio airplay reports.