If Wally's their best I reckon Gordon can take him.

Although, as an insurance policy, it should be a competition to demonstrate the "most likely" method as well as the most labour efficient. We spent quite a time fretting over whether the archaeologists would accept stone rowing as likely. Imagine their reaction if Wally put it to them that the stones were moved across the muddy plains of Wilts swivelling on two tiny pebbles.