This image is one of a collection of 42 images by John Tenniel that were the illistrations for the inital release of Alice in Wonderland by Lewis Carrol.
This is a completely free image Mad Hatter that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.