Where's Herbert?

A PD day at school meant an Owen and Daddy day today. The weather looked fine so we opted for a trip to Attingham to do the Spooky Secrets Trail around the mile walk, the idea being to discover what had happened to Herbert the Gardner. There were 5 clues/activities/puzzles including 'Clue B' here, drawing the monster* that could have left the scratch marks on the post.

As we made our way around the mile walk we bumbed into a couple of school friends, obviously with the same idea, so the last clue was solved as a team before running around the Field of Play.