Regulus in HBP????

[Carol]

Carol earlier: 
<snip> Probably they'll have some made up dialogue supplementing
Slughorn's remarks about "I'd have liked to have the pair," the only
reference to Regulus *as Regulus* in HBP that I can recall, but, of
course, he appears again in HBP. <snip>

Carol again:
I meant, Regulus is mentioned briefly in "Horace Slughorn" in HBP but
isn't mentioned again that I can recall (not counting the RAB
references) until his backstory is given in detail in DH ("Kreacher's
Tale"). Sorry if I confused anyone.

Carol, wishing she'd read her own post more carefully before hitting Send!