Most were quarrymen working in new granite quarries. Most notably, the Beatles developed from John Lennon's skiffle group the Quarrymen. McDevitt's version influenced many young skiffle groups of the day, including The Quarrymen. Work started on 18 May using bulldozers and several hundred quarrymen from Jerusalem. At the age of 15, Lennon formed a skiffle group, the Quarrymen. The Quarrymen, the precursor of The Beatles which included John Lennon. They later left his service to work for the Quarrymen. Paul McCartney's first appearance at The Cavern was with The Quarrymen on 24 January 1958. The "odeon", although damaged by the hands of quarrymen, has been partially restored. Three original members still perform as the Quarrymen. John organizes some of his friends into a band which he names the Quarrymen. In 1957 a local pop group called The Quarrymen appeared at the theatre. At 16, he played rhythm guitar with the Quarrymen. The Quarrymen recorded several low-quality, homemade, mono demo tapes. The Quarrymen booked a recording session on 12 July 1958.