Vintage Original Pencil Drawing of Janis Joplin 1970's - 18x24 Signed

Vintage Original 1968 - 1970's Pencil Drawing of Janis Joplin signed by Artist. The drawing depicts Janis Joplin, Big Brother and The Holding Company on stage at The Newport Folk Festival, Newport, Rhode Island, July 27, 1968. On Textured paper. Mat is 18" x 24". Drawing is 15" x 20". Some foxing / staining on rear of cardboard mat. I bought this from the artist when I was in High School approx. 1972.