Poncho
From The Arthur Conan Doyle Encyclopedia

Fictional horse.
In the Sherlock Holmes stories
A Study in Scarlet (1887)
- Poncho was the mustang horse of Lucy Ferrier. (2168)
- While riding Poncho, Lucy tried to pass a great drove of cattle, but the horse was frightened by the cows and went into a cavalcade (1709). She was saved by Jefferson Hope (1719).