'OId machinery,' Powell explained. 'I've examined them - they may talk.'
Powell took an atomic battery from his pocket and put it into the chest of one of the robots. 'You! Do you hear me?'
The robot's head bent slowly and the eyes looked at Powell. 'Yes, Master!' Its voice sounded rusty and tired.
'Can you go outside? In the light?'
The robot's brain worked slowly. 'Yes, Master.'
'We will take you upstairs and outside the station. You will go about thirty kilometres and you will find another robot, smaller than yourself. You will order him to return. If he doesn't wish to return, you must bring him back by force.'
'Yes, Master.'
'All right. Follow me.'
The robot didn't move. 'I cannot. You must ride me.'