A good example of the sort of mistake that is likely to occur is the frequent reversal of any number which the seer has to read from the astral light, so that he would be liable to render, say, 139 as 931, and so on. In the case of a student of occultism trained by a capable Master such a mistake would be impossible except through great hurry or carelessness, since sflch a pupil has to go through a long and varied course of instruction in this art of seeing correctly, the Master, or perhaps some more advanced pupil, bringing before him again and again all possible forms of illusioh, and asking him"What do you see?” Any errors in his answers are then corrected and