 Why does Baron think there was something wrong with Claney's filters?
He had no stomach for mysteries, vast or trifling, and there were pressing things to think about at this time. Yet the doorman had flagged him as he came in from the street: “A thousand pardons, Mr. Baron. Across to the right was a group that Baron knew vaguely—Andean climbers, or at least two of them were. Then he settled back and waited impatiently for the intruder who demanded his time without justifying it. Presently a small, grizzled man crossed the room and sat down at Baron’s table. He was a major in the Interplanetary Service for some years and hung onto the title after he gave up his commission. “I want to make a Crossing at perihelion and I want to cross on the surface.
 Claney's face is covered in cancerous tumors.
 Claney's face is extremely sunburned.  Claney's face is twisted and brown.  Claney's face is covered in scars.  Claney's face is covered in cancerous tumors.