midnight
If I had a dollar for every time he does n't know anything , I 'd be the richest boy in the world ! '' `` Are you thinking of going down the mine tonight ? '' asked George , with a wink at Will . `` We might try another midnight excursion . '' `` If you kids go into the mine tonight , '' declared Will , `` I 'll send you both back to Chicago on the first train ! '' `` Aw , how are you going to find these boys if you do n't go into the mine ? '' demanded Tommy .