According to Wikipedia these works would have been in print in French in 1870
Toilers of the Sea by Victor Hugo, 1866 Five Weeks in a Balloon by Jules Verne 1863 Alice's Adventures in Wonderland by Lewis Carroll was published in French translation by Henri Bué Aventures d'Alice au pays des merveilles 1869
(unfortunately Flatland was not published until 1884)
Re: Period literature
Toilers of the Sea by Victor Hugo, 1866
Five Weeks in a Balloon by Jules Verne 1863
Alice's Adventures in Wonderland by Lewis Carroll was published in French translation by Henri Bué Aventures d'Alice au pays des merveilles 1869
(unfortunately Flatland was not published until 1884)