The sleuth hound -ˈsluːθhaʊnd- (from Old Norse 'slóð' - track or trail + 'hound') was a breed of dog. Broadly it was a Scottish term for what in England was called the bloodhound although it seems that there were slight differences between them. It was also referred to as a 'slough dog' (or 'slewe dogge') and a 'slow hound' the first word probably representing a mispronuciation of 'slough' rather than a reference to the speed of the hound.