CHAPTER XXIII.

FROM SHERIDAN TO THE ROCKY MOUNTAINS--THE COLORADO PORTION OF THE PLAINS--THE GIANT PINES--ATTEMPT TO PHOTOGRAPH A BUFFALO--THINGS GET MIXED--THE LEVIATHAN AT HOME--A CHAT WITH PROFESSOR COPE--TWENTY-SIX-INCH OYSTERS--REPTILES AND FISHES OF THE CRETACEOUS SEA, 330-350