Here's another "Mother Goose and Grimm" cel I got sometime back.
(White spots in the cel are just reflections from the camera)
The animation drawing. The character was inked directly on paper (except for the glasses and the hair, which is on pencil), then xeroxed onto cel.
Does he seem familiar? You should, because this is in fact a cel of the Boogie Man, which I linked to a few weeks back. Here's a screengrab from the episode that features this cel. The mouth was on a separate cel (in the animation paper the mouth is drawn in blue pencil)