The painting shows a farmer standing beside his spinster daughter (not his wife, as so many parodies and references assume). The figures were modeled by the artist's dentist and sister... The three-pronged hay fork is echoed in the stitching of the man's overalls, the Gothic window of the house and the structure of the man's face. Each element was painted separately; the models sat separately and never stood in front of the house.Further info, esp re parodies, at Wikipedia. Re the house (which I should have blogged first, as an unknown), see this Wikipedia entry; it may be worth another post later.
Pic found at Retrogasm, via Lost Found and Envied.