Carl Perkins took the lead on only "Keeper Of The Key" and seemed content to play guitar and supply harmony vocals. He had, however, been singing all afternoon. Clayton Perkins and Jay Perkins and drummer W. S. Holland can be heard on the earliest titles. The rhythm guitar on the earlier songs was played by Charles Underwood, who was a writer for Phillips's publishing companies. Presley also brought with him another aspiring singer, Cliff Gleaves, who might be participating on some of the ensemble parts.