Examples of occult detectives in comic books include Doctor Spektor from Gold Key Comics, Hellboy from the Dark Horse series of same name, Dylan Dog from the Sergio Bonelli Editore series, Nightlinger by Steven Philip Jones and published by Caliber Comics, and Martin Hel a character created by Robin Wood. Two "Hellblazer" writers have gone on to write their own occult detective characters: "Sebastian O" also at Vertigo by Grant Morrison and Warren Ellis' "Gravel" from Avatar Press. "2000 AD" has featured a number over the years in their own eponymous series: "Bix Barton", "Devlin Waugh", "Ampney Crucis Investigates" and "Dandridge". The occult detective team of Syd Deadlocke and Doc Martin, featured in "Pulse of Darkness" and other comics by Chris G.C. Sequeira, also fits into this genre. There is also the comic book series "Ruse", once owned by CrossGen and now by Marvel Comics.