"The Elder Wand is the Hallow that is most easily traced, because of the way in which it passes from hand to hand."
"Which is what?" asked Harry.
"Which is that the possessor of the wand must capture it from its previous owner, if he is to be truly master of it," said Xenophilius. "Surely you have heard of the way the wand came to Egbert the Egregious, after his slaughter of Emeric the Evil? Of how Godelot died in his own cellar after his son, Hereward, took the wand from his? Of the dreadful Loxias, who took the wand from Barnabas Deverill, whom he had killed? The bloody trail of the Elder Wand is splattered across the pages of wizarding history."