Some beautiful visual development art by Vance Gerry and Ken Anderson.
Ken Anderson art directed The Sword in the Stone, Vance got credit as a layout artist. But as you can see he did much more than production layouts, he created color environments for many sequences, including the one with Merlin and Wart as fish.
When I started at Disney in 1980, Ken was around, but was getting ready for retirement.
Vance on the other hand worked on quite a few more films, including Mouse Detective, Beauty and the Beast and The Lion King.