Here's a pencil sketch by John R. Neill for the character Gureeda, from Speedy in Oz. This drawing looks like it was cut from a page of sketches - it's now been mounted on a larger backing.
An unusual feature is Neill's bold signature across the bottom of the picture; he didn't tend to sign his sketches, or even many of his finished Oz drawings at this time. My theory is that this was sent to an Oz fan who asked for an autograph, or possibly a drawing.
The sketch doesn't match up to any finished drawings of the character in the book.