Reference

Long John Baldry, a prominent English blues singer, is featured on lead vocals in several albums. Notably, he performed lead vocals on three tracks of the album "R&B from the Marquee ~ Blues Incorporated" released in 1962, including the song "How Long, How Long Blues" [1]. His 1971 album "It Ain't Easy" marked a return to his blues sound and is another example of an album where he took the lead vocals [2]. Additionally, the album "Long John's Blues," released in 1964, is an example of his work where he sang lead vocals [3]. The album "On Stage Tonight - Baldry's Out!" from 1993 also features Long John Baldry on lead vocals for several tracks [4]. These albums are key examples of his vocal contributions in his music career. For more detailed information, you can refer to his Wikipedia page [1] or explore his discography on sites like Discogs [5].