Mark of Merlin

The mark of Merlin was a "mysterious rune" that the wizard used to mark his possessions.

Behind the scenes

 * This mark is only mentioned as a possible answer to a hypothetical question posed during the sorting quiz on Pottermore. Therefore, it is unclear if Merlin actually used this symbol as his mark in historical canon.
 * Oddly, the box that supposedly bears this mark appears to be completely plain other than the lock. It's possible that the mark is merely on a side of the box that is not seen, however.

Appearances

 * Pottermore