" Sometimes she could swear that she saw, in Joe Grey's eyes, a judgment far too perceptive, a watchfulness too aware and intense for any cat.
Charlie didn't understand what it was about those two [cats]. Both had a presence that set them apart from other felines.
Maybe she just knew them better. Maybe all cats had that quality of awareness, when you knew them. "

― Shirley Rousseau Murphy , Cat in the Dark (Joe Grey, #4)