But Zimbabwe, with its minimum age of some three millenniums, stands far more firm, more intact, and complete than any one of the comparatively few-centuried old ruins to be found anywhere at Home. Planted in South-East Africa at over two hundred miles inland from the coast, in the midst of populations that know nothing whatever of its origin, Zimbabwe’s massive and imposing walls reveal even to the most casual and indifferent of visitors the plan, purpose, and design of the original builders. Yet has it been subjected for three millenniums to the destructive agency of lightning storms, the frequency and severity of which in South-East Africa are well known. Severe earthquakes must have shaken its foundations, but the massive walls remain practically intact. Arab tradition speaks of violent earthquakes in South-East Africa during the fifth century, while the condition of some of the ruins in Rhodesia, where the walls have fallen _en bloc_ sideways on to the ground, testifies to frequent, general, and violent earth-movements and earth-strains having taken place. The South-East African cyclones passing over it during thirty centuries probably have caused further dilapidations. Still, though so many walls at Zimbabwe remain more or less intact, it would be impossible to estimate the extent to which many walls may have suffered, or what have possibly disappeared altogether from the effects of earthquakes, for it would be difficult to suppose that these extensive ruins—some walls being built on the actual brink of precipices—have escaped all the destructive effects of earth-movements and storms which have occurred during the last three thousand years.