Dead low water at Boulogne Harbour, and a slack time for the motor ambulances parked on the quay above. The work of the R.A.M.C. inevitably comes in rushes, with lulls in between. The great thing is, when a rush comes, to treat every case with a rapidity exactly proportioned to its urgency, removing instantly to the base hospitals or to England every serious case which will be the better, or none the worse, for a slight delay in operation. To work this system perfectly there must always be in readiness, at every point where wounded are entrained or transhipped, a supply of ambulances equal to the maximum call.