Read it through once

But belief is not proof. It was reserved for La Salle to furnish the proof. He was provokingly delayed, by one misfortune after another, but at last got his expedition under way at the end of the year 1681. In the dead of winter he and Henri de Tonty, son of Lorenzo Tonty, who invented the tontine, his lieutenant, started down the Illinois, with a following of eighteen Indians brought from New England, and twenty-three Frenchmen. They moved in procession down the surface of the frozen river, on foot, and dragging their canoes after them on sledges.