 How does Loy Chuk communicate with Ned?
Loy Chuk had flown his geological expedition out from the far lowlands to the east, out from the city of Kar-Rah. In twittering, chattering sounds, he communicated his further knowledge to his henchmen. Medical and biological sciences were far advanced among Loy Chuk's kind. The mummy was taken to Loy Chuk's laboratory, a short distance below the surface. Ned Vince did not know how Loy Chuk had probed his brain, with the aid of a pair of helmets, and the black box apparatus. He did not know that in the latter, his language, taken from his own revitalized mind, was recorded, and that Loy Chuk had only to press certain buttons to make the instrument express his thoughts in common, long-dead English.
 Loy Chuk has a device that converts his thoughts into English.
 Loy Chuk communicates with Ned through telepathy.  Loy Chuk has a device that translates his speech into English.  Loy Chuk has a device that lets him speak English.  Loy Chuk has a device that converts his thoughts into English.