Regulus Black Was An Unsung Hero When Harry found the letter by R.A.B. in the basin, he was stumped by who it could be. This was because nobody, except for Kreacher, knew of Regulus Arcturus Black ...

A saying goes, "Poke a hole in the bottom of the big dipper's cup and the milk will spill on the lion's back." Sure enough, if you follow this imaginary stream of milk southward you encounter Leo ...

The mysterious R.A.B., who turns out to be Sirius Black's brother Regulus, plays a small but pivotal role in the Harry Potter franchise.