Here is another old wolf boy image.
This image was colored digitally, in Painter I believe. For a lot of the images I also cleaned up the black lines quite a bit in Photoshop. For example, the last image I added the cross hatched border. The original was in black and white and was not framed in that round border. Using the copy stamp tool and cutting the cross hatching from my other drawings I was able to convincingly place the drawing into a framed format. It looks like it was physically drawn in that manner. This saved me lots of tedious cross-hatching and ink.