Davy's eyes turned slowly to one of the little boys that had been in the yard when Harry mentioned his son. His eyebrows lowered as he stared accusingly at the child, until Harry had finished talking and Davy's eyes slowly turned back to the man, eyebrows still furrowed.

"I need a skilled, responsible man for the pump." All attempts at faux jolliness were gone at this point. "Not a child who's just seen you fix a bicycle, Mr. Longbottom. Getting the air down there is too important a job for just some child." In his distress at imagining his life in the hands of 'Not Kitty, boy addition', he let slip more information than he necessarily wanted to.