In St. Mungos, when they are going to visit Mr. Weasley- 'They climbed a flight of stairs and entered the "Creature-Induced Injuries" corridor, where the second door on the right bore the words 'DANGEROUS' DAI LLEWELLYN WARD: SERIOUS BITES.' If you put these words on a sign, they would read:
Creature-Induced Injuries
Dangerous
Dai Llewellyn Ward
Serious Bites
Take the first word of each of these and what do you get get? Creature Dangerous Dai Serious? No - Kreacher dangerous, Die Sirius...
Merlin's beard
Et "Lunard, Queudver, Patmol et Cornedrue" meurent dans l'ordre inverse indiqué sur la carte : d'abord James, puis Sirius, puis Peter, puis Remus.