Please update the given paragraph with different wording.
As he walked back towards the inside, or the outside depending on how you looked at it, Arthur and Fenchurch looked at each other in a wondering and slightly desperate sort of way, then each shrugged and idly drew figures in the sand.
When he started to head out and in and out, according to your view of that, Arthur and Fenchurch looked at each other in wonder and mild despair, then both shrug and went on scribbling pictures on their sand.