Kathlogroh knew the mirror-surface was a window behind which the natives watched his every more, studied him. He didn’t mind, not as long as they kept bringing him food.
The language barrier was formidable. He continuously tried to make them understand what components and materials he needed to build a transmitter that would bring rescue, but they seemed not to understand; certainly the components were not forthcoming.
Perhaps they were attempting to build it for him. Given their level of technology, the idea would have amused him had his desperation not been so great. He would have to keep trying.