For the benefit of others who may be more intuitive it may be well tosay a word or two that may guard them from supposing that becausehistorical research by means of astral clairvoyance is not impeded byhaving to deal with periods removed from our own by hundreds ofthousands of years, it is on that account a process which involves notrouble. Every fact stated in the present volume has been picked upbit by bit with watchful and attentive care, in the course of aninvestigation on which more than one qualified person has beenengaged, in the intervals of other activity, for some years past. Andto promote the success of their work they have been allowed access tosome maps and other records physically preserved from the remoteperiods concerned--though in safer keeping than in that of theturbulent races occupied in Europe with the development ofcivilisation in brief intervals of leisure from warfare, and hardpressed by the fanaticism that so long treated science as sacrilegiousduring the middle ages of Europe.