What is "gallopers"

Usage examples of "gallopers".

Even as I speak to you all here, elements of Lord Alexandras' fleet are assembling in and around one of the rivermouth ports of southern Karaleenos, awaiting only the word from one of my gallopers to set sail for Neos Kolpos.

Of course, your position there on the right gave you a perspective which mine own denied me, but I am here to state that you accomplished what was undoubtedly your purpose, accomplished it with a vengeance, I might add, and gallopers were dispatched to the King with news of your victory ere you and your retinue had returned to our lines.