It is still fresh in our memory that the Geological Society of London made a bold attempt a few years ago to arranga a wide-ranging discussion on the problem of continental drift. On an occasion of this nature one might be tempted to imagine a scene as lively as that when the Wernerians and Huttonians met at the Castle Hill of Edinburgh. But the opponents of the hypothesis, as the report revealed, seem to have stood no less firm than do the continents, as they hold. One looks in vain, since the publication of the American Symposium, for a change in the trend of opinion. This, however, does not mean that the problem is closed. We thus welcome the fresh lead given by Dr. A. L. du Toit in his recent volume on Our Wandering Continents.