The pop duo phenomenon that spawned such acts as Simon & Garfunkel, Brewer & Shipley, and Seals & Crofts was predated by the duo formed by songwriters, guitarists, and vocalists Benny Gallagher and Graham Lyle. Initially attracting attention as songwriters of Dean Ford & the Gaylords' single "Mr. Heartbreak's Here Instead," Gallagher and Lyle went on to record as a duo and as members of McGuinness Flint and Ronnie Lane's group Slim Chance. Gallagher and Lyle continued to balance their performances and recordings as staff songwriters for the Beatles' Apple label, writing "Sparr...