sooner or later someone in the mill was bovmd to be infected by the same idea , and it was n't entirely surprising that the someone should turn out to be rory dinsmore , who was by far the sharpest tool in the dinsmore family box ( 'i do n't know where he gets it from , ' shelley dinsmore said when rory brought home his first ail-as rank card ... and she said it in a voice more worried than proud ) .