Is fine art by robert gallon,oil painting worth money?

my fine old art oil painting is in black and white,many bulls standing in a field with stormy skyIs fine art by robert gallon,oil painting worth money?
Auction prices for;





Robert Gallon (1845 - 1925)


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Robert Gallon (1868 - 1903)


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You should take this picture to a fine-art auctioneer for appraisal.

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