In the 1970 catalogue raisonné, based on Jacob Baart de la Faille's researches, the paintings were dated 1882.[5]Jan Hulsker, however, feels they must be associated with his 1883 painting Cows in the Meadow, a painting known only by a very poor photograph, and accordingly dates them as August 1883, thus executed shortly before van Gogh broke with his mistress Sien Hoornik and left for Drenthe.[6]
^Brooks, D. "The Paintings". The Vincent van Gogh Gallery, endorsed by Van Gogh Museum, Amsterdam. David Brooks (self-published). Retrieved 17 February 2011.
^Lying Cow F1c. Van Gogh Gallery. Retrieved 16 January 2011.
^Lying Cow F1b. Van Gogh Gallery. Retrieved 16 January 2011.