A ghost cow
One of our colleagues bought, in Italy, a beautiful Luigi Chialiva watercolor art-piece showing a fully active farm half hidden by a grove in its background and a pond in front.
When we get closer to the painting, we can see some dotted lines forming like an easily recognizable sketch: a cow drinking in the pond.
We know for a fact, that Luigi Chialiva was usually making his paintings in several steps. We may find later, somewhere the similar art-piece being completed.
N.B. The same colleague has bought an uncompleted Luigi Chialiva non completed painting showing a naked farmer waiting to be dressed-up.
Always so surprising, our Chialiva !

 Farm with a pound (Luigi Chialiva)
A ghost cow