This year, which marks the Centenary of the Red Cross, the Central Tracing Agency is visited by larger numbers than ever before of people wishing to inform themselves on its activities. Whether it is a question of members of National Societies, groups of university students or of tourists passing through, they are all struck by the sight of millions of index cards and the voluminous archives which still remain an invaluable working instrument for the Central Agency. Indeed the necessary information is extracted daily from these sources for establishing the identity of deceased military personnel, the handing over of attestations of captivity and tracing civilians separated by war etc.