about eleven o'clock
The morning was clear , but it was by far the coldest we had experienced . The thermometer at the station marked below zero at sunrise . We almost longed for another prairie fire . It grew a little warmer after we started , and at about eleven o'clock we reached Fort Pierre , on the Missouri , opposite the town Of Pierre . The ferry-boat had not yet been over for the day , but was expected in the afternoon . `` You 're lucky to get it at all , '' said a man to us . `` It is liable to stop any day now , and then , till the ice is thick enough for crossing , there will be no way of getting over . ''