-> fontes: All Music Guide, Bootleg Zone, Paul McCartney's sessions e Wikipedia.
After Band on the Run, Jimmy McCulloch, former lead guitarist in Thunderclap Newman and Stone the Crows, joined the band. The first Wings project with McCulloch was McGear, a 1974 collaboration between Paul and his younger brother Mike McGear, with session musician Gerry Conway playing drums. Warner Bros. Records chose not to play up the "Wings" angle in its marketing for McGear, and the album sold poorly. However, the sessions also generated a single credited to McGear's group The Scaffold, "Liverpool Lou", which became a top-10 hit in the U.K. Shortly thereafter, Geoff Britton was added to Wings on drums, and the first recording session with the full lineup was held in Nashville, where the band stayed at the rural farm of songwriter Curly Putman Jr. The trip was memorialized in the 1974 non-album single "Junior's Farm", backed with a straight country track entitled "Sally G", the group's last release on Apple Records. During these sessions, Wings (with guest musicians Chet Atkins and Floyd Cramer) recorded a single that was attributed to "The Country Hams" entitled "Walking in the Park with Eloise," a song written years before by Paul's father James. Also, a Laine/McCartney song ("Send Me the Heart") was recorded but not released until Laine's Japanese Tears.
-> From Wikipedia.