It was a sad necessity, for I knew that the tide was falling very fast, and that before long we should be immovable; but to have kept on shifting the load and allow the enemy to get close in over our heads on the densely-clothed sides of the stream would, I knew, be madness; and the men showed how they appreciated the common-sense of the order by getting at once under cover, and then the sharp rattle of our fire was more than doubled.