Porters almost invariably accompany them. There are also extremely swift messengers with spider-like legs and 'hands' for grasping parachutes, and attendants with vocal organs that could well nigh wake the dead. Apart from their controlling intelligence these subordinates are as inert and helpless as umbrellas in a stand. They exist only in relation to the orders they have to obey, the duties they have to perform.
What can the reader infer about the Selenite messengers in the passage above?
