Jacks and Jennets

The Maysville (Ky.) Eagle is gratified to state that the Mason County importing Company have received advices of the shipment, at Barcelona, in Spain, of eight Jacks and eight Jennets, expected to arrive at Charleston about the middle of December and reach Maysville by the first of January.  The order sent out was for the best animals that could be selected in the Kingdom of Spain, without regard to cost.  We anticipate a great improvement of the Jack and Mule stock of the country from this importation

from the New York Times of December 7, 1852.  If you don't know how to tell your mule from a jack, let alone a jennet from a hinny, the Wikipedia explanation is here.