surcingle

The saddle was the next slow process—a surcingle, a folded blanket and cinch, a double blanket and cinch, a bag of oats and cinch and, finally, the saddle and rider.

From The Preacher of Cedar Mountain A Tale of the Open Country by Ernest Thompson Seton

The surcingle is then buckled over the saddle, and should be a little looser than the cincha.

From Manual for Noncommissioned Officers and Privates of Cavalry of the Army of the United States 1917 to be also used by Engineer Companies (Mounted) for Cavalry Instruction and Training by U. S. War Department

The surcingle is of leather, and fastens in the Mexican style; the girth is also of leather, three and a half inches wide, with a large buckle.

From The Prairie Traveler A Hand-book for Overland Expeditions by Randolph Barnes Marcy

It is as well, if possible, to teach colts from a very early age to bear a surcingle.

From A New Illustrated Edition of J. S. Rarey's Art of Taming Horses With the Substance of the Lectures at the Round House, and Additional Chapters on Horsemanship and Hunting, for the Young and Timid by J. S. (John Solomon) Rarey

Taking the robe from my shoulders, I spread it over the back of my horse; and employing a piece of the laryette as a surcingle, I bound it fast.

From The Wild Huntress Love in the Wilderness by Mayne Reid