By 1889, the number of which animal on the American plains had fallen from tens of millions to only a few hundred?

Between 1841 and 1853, four U.S. presidents came from which political party that no longer exists? Between 1842 and 1885, which poet repeatedly revised and expanded his "Idylls of the King"? Between 1846 and 1853, Franz Liszt composed the first 15 of his Hungarian what? Between 1850 and 1864, the Taiping Rebellion claimed an estimated 20 million or more lives in which country? Between 1853 and 1856, commissioners bought land for which 843-acre New York City park? Between 1856 and 1860, nearly 3,000 members of which faith set out from Iowa and Nebraska to Utah pulling handcarts? Between 1856 and 1863, which monk tested thousands of pea plants in his monastery garden? Between 1865 and 1885, which empire took over the area of present-day Turkmenistan?