Complex sentence: Edwards found more regular work at music festivals and in local clubs, and also joined John Jackson, John Cephas and Phil Wiggins, Flora Molton and Mother Scott, and played around Washington billed as the Travelling Blues Workshop.
Split into simpler sentences: Edwards found more regular work at music festivals and in local clubs. He also joined John Jackson, John Cephas and Phil Wiggins, Flora Molton and Mother Scott, who performed around Washington billed as the Travelling Blues Workshop.