See quotations.
1823. They frequently make these jumpers to convey their game home.J. F. Cooper, The Pioneers, ii. x. (N.E.D.)
1833. Did you ever see a jumper? Probably not; so I ll describe one to you. It is a primitive kind of sledge, or traineau. A couple of hickory poles are so bent as to serve for both shafts and runners; on these is placed a crate, supported by four props.C. F. Hoffman, A Winter in the Far West, i. 194 (Lond., 1835). (Italics in the original.)