Hi there, Hoolihan is a party, Dan is the name of the horse. "I'm riding old paint, and I'm leading old Dan. Off to Montina to through a Hoolian"

Or something like that. FYI The old cowboys might have more than one horse. A standard string (like on a roundup) might be a 12 horses. then when you are traveling, you need another horse to carry your camp gear. Sometimes it took weeks to get from place to place. So you had to carry your grub. Of course you could shoot a deer or something like that. But people still like bacon and coffee. Hard to shoot a bacon tree.