Today's bon bon: In 1888, how much did a writer earn from a publisher to whom she sold her novel?

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Pierce Hanniford and Camille Bereston in RAVISHING CAMILLE discuss what she earns writing gothic novels. This is 1888 and in England, a publisher could buy the rights to a book outright. Pay a small fee, such as 500 GBP. 

The book was usually on the stands for 6 months at which point, it went to a “railroad edition” that sold for less. An author would not make much money, unless he/she wrote quickly—and published another book!