b. April 15, 1820, d. June 9, 1881
“In 1851 he published in a modest form, Reponses aux objections les plus repandues contre la religion; it met with considerable success.
“At the time of his death 700,000 copies had been sold in France and Belgium without counting the many editions in Italian, German, English, Spanish, and even in the Hindu language.”
https://www.catholic.com/encyclopedia/louis-gaston-de-seger