In it, two dogs watch as two men try to coax a team of three red-yoked horses to pull an unladen wagon through a ford in a river.  
It is said that it was so inspiring that Eugene Delacroix repainted his Massacre of Chios upon seeing it.  This painting was first exhibited at London's Royal Academy in 1820, and at the Paris Salon of 1824 it was awarded a gold medal and caused great excitement among French painters. In it, two dogs watch as two men try to coax a team of three red-yoked horses to pull an unladen wagon through a ford in a river.  For 10 points, what is this painting, which had such an influence on Barbizon School painters, by John Constable?
It is said that it was so inspiring that Eugene Delacroix repainted his Massacre of Chios upon seeing it.  
The Haywain