Christ Church Library has a very nice collection with among others Lewis Carroll / Alice in Wonderland related material. Currently they are in the process of digitizing their material. A large part of the collection can already be found online.
Part of their online catalogue is dedicated to Lewis Carroll, and this section contains a subsection with material related to the creation of the ‘Alice’ books. The latter contains high-resolution scans with detailed descriptions of amongst others:
- Manuscript illustration plans for “Alice’s Adventures in Wonderland” and “Through the Looking Glass and what Alice found there”;
- Sketches from Lewis Carroll, which he drew to practice his illustration skills before he illustrated “Alice’s Adventures Under Ground”;
- Drafts for title pages;
- Galley proofs;
- Correspondence with publishers and financial accounts.
Keep an eye on this collection, because the catalogue is still a work in progress!