Two drawings, the first pen drawing is signed and dated, and looks to be original. There are pen imprints that push through to the back and it smells... well, inky. The second color drawing looks like different quality paper and I don't see and imprints on the other side. May be a copy.
Both found in "Cat Stevens: Teaser and the Firecat - Piano/Vocal/Guitar" published by Walter Kane / Triangle Music, 1971.