* Owner's Name: Knowing the owner's name would help locate the horse.
* Stable or Farm: If the horse is in a stable or on a farm, knowing its location is crucial.
* Region/Country: Knowing the general area or country where the horse is located would narrow down the search.
* Breed or Distinguishing Features: Knowing the horse's breed or any unique features could help identify it.
If you have any of these details, you could try searching online databases for horses, contacting local horse organizations, or posting in horse-related forums.