If that locket has a Black spell on it, that leaves a few people who are Blacks to open it: Sirius, Tonks, Narcissa, Bellatrix and Draco. Sirius was considered a traitor by his family, and there's good reason to believe there was no love lost between him and Regulus, so Regulus may not have considered Sirius a Black and not given him access to the locket.
But by stealing the locket in the first place, not to mention revolting against the Dark Lord, would Regulus be in a position to judge Sirius as a traitor to the family? Furthermore, he had to have been aware that at least two other Blacks in the family were loyal Death Eaters (Narcissa and Bellatrix), so putting an enchantment that is safe only to Blacks seems more hazardous than prudent; I mean, Regulus had to have known that he would not be looked on kindly by the rest of his family (if not his immediate family, at least by his cousins) for deserting the Dark Lord. He also had to have known that (at the time) if either Bella or Cissy got their hands on the locket, they'd take it straight back to Voldemort.
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Date: 2005-07-18 08:26 pm (UTC)But by stealing the locket in the first place, not to mention revolting against the Dark Lord, would Regulus be in a position to judge Sirius as a traitor to the family? Furthermore, he had to have been aware that at least two other Blacks in the family were loyal Death Eaters (Narcissa and Bellatrix), so putting an enchantment that is safe only to Blacks seems more hazardous than prudent; I mean, Regulus had to have known that he would not be looked on kindly by the rest of his family (if not his immediate family, at least by his cousins) for deserting the Dark Lord. He also had to have known that (at the time) if either Bella or Cissy got their hands on the locket, they'd take it straight back to Voldemort.
Sammy