The Collaborative International Dictionary of English v.0.48:

Sleuthhound \Sleuth"hound`\, n. [See Sleuth, and cf.
   Slothound.] (Zool.)
   A hound that tracks animals by the scent; specifically, a
   bloodhound. [Spelt variously slouthhound, sluthhound,
   etc.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sluthhound \Sluth"hound`\, n.
   Sleuthhound.
   [1913 Webster]