At Nico's birthday party, 11 of them had to navigate the clues to find the treasure at the end . . .
The rebus told them where to look for the first set of scrolls:
[In 2 seconds they were under every picnic table, finally to find a scroll that read:]
[And when they had done that -- eight of them together finally carrying to him an enormous, braided hempen rope frozen into the shape of a snake -- Porter told them:]
Look to Vulpes vulpes!
[There at the feet of the taxidermist's specimen they found:]
[They got the joke eventually and found a camera chip --
plugged it in and saw a hand slipping the next clue beside the striped skunk's den.]