"study :" The Hives "1875"

I just made a beautiful marriage between this mahogany frame with bronze facings and this beautiful landscape study done on free canvas and mounted thereafter on a canvas frame a little larger. No, it's not like I've been told about haystacks or African huts, but traditional hives protected by a straw blanket.
The boldness of the composition and the freedom of touch, however very realistic, show us that it is the hand of a great, but which one?
On the back of the frame, an inscription almost erased: "mounted on canvas 1875 A. Lebourg". I doubt that it is the impressionist painter of Rouen, especially since I am not sure to read well, but the date seems correct.
The frame measures 19.5 X 30 cm with the remains of a red wax stamp on the back, the frame that has lost the heel of one of the short sides, 26 X 36 cm.
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