Done for a contest at HQ-Holmes
Inspired by the scene in the Granada-filming of The empty House where Watson shows Holmes the letter from Reichenbach (which he did let frame) and calls it "my most valuable possession". I imagine Holmes had quite a bit of thinking to do the following night -- and Watson, not able to sleep either, surprises him contemplating the letter.
Whew, that was really almost last minute.
Pencil sketch, inking and colouring Photoshop Elements 9