Sandor Still Alive?
It is thought that Sandor Clegane is still alive and living as a novice at the monestary on the Quiet Island.
The Elder Brother of the monestary, while speaking to Brienne, seems to know an awful lot about the mind and soul of Sandor Clegane. Perhaps too much for having only briefly spoke to him as he died.
The gravedigger at the monestary is a large man.
The gravedigger, along with all the other novices, wears a scarf which covers his face which would have made it impossible for Brienne to have seen the distinctive burns attributed to Sandor.
The gravedigger has an injury similar to the one that Sandor received at the Inn at the Crossroads.
Brienne notices the gravedigger bend down to pet a dog, which many readers believe is a hint left by GRRM.
The Elder Brother is very vague while speaking of the death of The Hound. It is possible that he is speaking metaphorically and that he believes the violent and angry version of Sandor has died and now the new Sandor lives on. This is supported by the fact that the Elder Brother mentions that he 'died' on the Trident when he used to be a warrior. In reality his 'death' only consisted of a major life change (as he believes Sandor has taken).