These are very small thumbnail sketches Ollie did before going into full animation on the "Mowgli meets Baloo" sequence from The Jungle Book. He worked of storyboard drawings, but went further in terms of personality business and acting ideas.
His mind was not on doing great drawings (even though they are) but on finding the characters' inner feelings. This was always the thing with Ollie, what is the character thinking, and why does he feel this way?
I believe footage from Disney's life action 1953 documentary Bear Country inspired some of the scenes in which Baloo finds entertaining ways to scratch his furry body.
More on this topic in this previous post: