Led Zeppelin Cover Art / Vinyl Album Art Work: who made this?

[AJ9876]

So I am in the process of moving and I found an original ink drawing someone did of the Led Zeppelin IV cover art: The Old Hermit. I bought it from an older lady who’s son had won it in a radio contest a long time ago. Sadly the son passed away while still young and the lady was now moving into assisted living. I forgot about it and honestly...I didn’t know what it was till I found it in the back of a closet and through it in the bin and my friend went diving head first after it. Anyways I guess I’m trying to find out what it actually is. It’s pretty old and is hand drawn with ink. It’s signed I think and is about 3’ high. Is it just fan art or should I have someone look into it or...? Any help or input would greatly be appreciated! Cheers