Four boys on a D. of E. expedition were reported missing overnight. Their supervisor had been to check on them at their campsite at Grisedale Tarn, but had been unable to locate them, so reported them missing. We located the boys making their way to Grasmere, having spent the night at their campsite at......... Grisedale Tarn. They had pitched their tent in the lee of small mound to protect it from the wind, and had heard the supervisor calling them, but had been unable to attract his attention. Boys 1: Supervisor 0.