Just because it's there

This one from the weekend at Stubbs Wood when Lewis was in slightly more energetic shape than he is at the moment. He's been very under the weather for the past two days, even having the day off school yesterday - and that for Lewis is very unusual.

He doesn't have a temperature at all, and is complaining of stomach ache, but mainly from about the late afternoon onwards. He's even been coming in to see us in the middle of the night to tell us how much he's suffering. He has a fairly reasonable appetite, so we are confused?