Tales of WID 72 #16 The Trail of Blood
"I know how it sounds," Sherlock Holmes said as he paced in the office, occasionally glancing at the bookshelves lining the walls. "But there's no doubt in my mind that Moriarty is now a Vampire, and he is working for another Vampire who is even more powerful than he is."
Tales of WID 72 #16
It's the second part of the Sherlock Holmes vs. vampires trilogy!