Around this time, Dylan became disillusioned about using the Hawks in the studio. He recorded more material at Studio A on January 25, backed by drummer Bobby Gregg, bassist Rick Danko (or Bill Lee), guitarist Robbie Robertson, pianist Paul Griffin, and organist Al Kooper. Two more new compositions were attempted: "Leopard-Skin Pill-Box Hat" and "One of Us Must Know (Sooner or Later)". Dylan was satisfied with "One of Us Must Know"; the January 25 take was released as a single a few weeks later and was subsequently selected for the album.