"No communication." Baines was sweating. "In eighteen years there hasn't been any semantic bridge between you? Does he have any contact? Signs? Codes?"
"He — ignores us. He eats here, stays with us. Sometimes he plays when we play. Or sits with us. He's gone days on end. We've never been able to find out what he's doing — or where. He sleeps in the barn — by himself."

The Golden Man (1954)