The "Vampire Killer" Colt Detective Special is at the National Firearms Museum in Fairfax Virginia. Here is a direct link to it on their website..
See a YouTube video of Phil Schreier, Senior Curator of the NRA Museum talking about the New Robert E. Petersen Gallery and the Vampire Gun.
C. Roger Bleile's American Engravers - The 21st Century with over 275 pages featuring the work of nearly 40 American Engravers is now available at Blue Book Publications, Inc.
Got gun engraving books? R. L. Wilson has authored an extensive and unique collection of books and videos honoring the craftsmanship, romance and technology of guns. They're all at wilsonbooks.com.