Which French Impressionist painted many ballet rehearsal scenes in the 1870s?

Which author's first novel published under his own name was "A Pair of Blue Eyes" (1873), followed by "Far from the Mad… Which poet, who lived from 1874 to 1963, wrote "North of Boston" and "Mending Wall"? Escamillo is a bullfighter in which 1875 opera? Which thinker wrote in 1875, "From each according to his abilities, to each according to his needs"? Which 1876 Mark Twain novel features a boy who tricks friends into whitewashing a fence? Who was first lady from 1877 to 1881? In 1878, Joseph Winters patented a wagon-mounted fire escape made of what? Leo XIII reigned from 1878 to 1903 as the most recent pope with which name, also a zodiac sign?