 How do Martians communicate with men from Earth?
The golden Moon and the silver ship, symbols of greed. If a half dozen winos in Seattle hadn't helped me get them loose, Doc and I would have been wanted for the murder of a North American Mountie. All my great-grandfathers have it. I told the human no, thanks, and walked Doc toward the flophouse three doors down. Martians approaching the corner were sensing at Doc and me. I found I couldn't focus both my mind and my eyes through the electric flashes of agony, so I concentrated on Doc's voice and trusted my hands would follow their habit pattern and construct the symbols for his words. Oh, are ... see ...." They told everything I needed to know to become the most powerful man in the Solar Federation.
 By sensing and without the need for talking.
 Without using logical sense, only the imagination.  By sensing and without the need for talking.  Through manuscripts and unwritten books.  Via time travel.