The Iron Worker's Daughter and The Piano Mistress

I can't find listings for either of these films. On pp. 77-78 of Republic of Images: A History of French Cinema by Alan Williams (Cambridge: Harvard University Press, 1992), he quotes a 1908 letter from Léon Gaumont to Louis Feuillade mentioning that these two films are marvelous but unshowable in the American market because their subject matter would offend the morals of the public. The end note says he got it from Francis Lacassin, Pour une contre histoire du cinéma (Paris: Union Générale d'Editions, 1972), p. 67. Either the translation is loose or these films are not included in IMDb, and I'm not getting other hits on Google.  Google Books gets a bit of the sentence from Williams, but the page is behind a paywall.  I have the print book and don't need that.

Feuillade was bwing written to in his capacity as studio executive, so he may not have been more involved with them in anyhting beyond that capacity, and it would be no more than an educated guess to say that they were Gaumont releases, since obviously the executives would be keeping abreast of what the competition was doing.