sentences:  The group performed in benefits and high school parties before being signed to the Chess Records subsidiary Checkmate (later bought by Motown Records), where the group recorded a single, "I'll Let You Know", with Williams on lead.Once at Motown, the group during this period sung backing vocals for other acts/artists on studio recordings, such as Marvin Gaye.Williams sung lead on an early single, "There He Is (At My Door)", on the Mel-O-Dy subsidiary of Motown after the group changed their name to The Vels.