In this return by Edward Gorey as illustrator, he begins the format he will employ throughout the remainder of the series. There is a big full color dust-jacket painting and (usually) a frontis illustration. Sometimes there are spot illustrations which are dropped into the text, but the books are not fully illustrated. The frontis drawing for this title is a particularly nice.In November 2010, Goreyana acquired the frontis illustration and provided additional commentary:
The skill of Edward Gorey's crosshatching technique in this piece of art is a master class in line manipulation. In this single image Mr. Gorey uses variations of line to render the cave, figures, rain outside the cave, fire, smoke from the fire, and the enveloping darkness surrounding them. I especially like the two pinpoint glowing eyes of the advancing figure which are added with small dots of white paint.