A Frog, On a Log, Beside a Deep Bog Then along comes a Dog The frog jumps off his log, and disappears deep down into the green bog, right in front of the dog! Then along comes a Cat… A Frog, On a Log, Beside a Deep Bog, is a beautifully illustrated picture book written in rhyme, for fun reading time. Children will love anticipating the reappearance of the frog, and the repetition of the text as new characters join the group beside the deep bog.