Examples from the Web for packhorse
Benjamin Franklin was then but a year old, and electricity had not become the packhorse of the world.
When I rode up to Jack's place I saw his horse and packhorse tied up outside the gate.
His packhorse carried his tenting, a big bag full of fancy clothes, and a couple of heavy law books.Shaman|Robert Shea
And as he rounded the last spur, with his packhorse trotting after him, I thought he must have felt very lonely.
Ere he returned to the "Packhorse" he had determined to take another step in the right direction.