It was asked: “What planets, of those known to ordinary Science, besides Mercury, belong to our system of worlds?” Now if by “system of worlds” our _Terrestrial Chain_, or “String,” was intended, in the mind of the querist, instead of the “Solar System of Worlds,” as it should have been, then of course the answer was likely to have been misunderstood. For the reply was: “_Mars, etc., and, four other planets of which Astronomy knows nothing. Neither A, B, nor Y, Z, are known, nor can they be seen through physical means, however perfected_.” This is plain: (_a_) Astronomy as yet knows nothing in reality of the planets, neither the ancient ones, nor those discovered in modern times. (_b_) No _companion_ planets from A to Z, _i.e._, no upper Globes of any Chain in the Solar System, can be seen; with the exception of course of all the planets which come _fourth_ in number, as our Earth, the Moon, etc., etc. As to Mars, Mercury, and “the four other planets,” they bear a relation to Earth of which no Master or high Occultist will ever speak, much less explain the nature. In this same letter the impossibility is distinctly stated by one of the Teachers to the author of _Esoteric Buddhism_: “_Try to understand that you are putting me questions pertaining to the highest Initiation; that I can give you (only) a general view, but that I dare not, nor will I, enter into details_....” Copies of all the letters ever received, or sent, with the exception of a few private ones—“_in which there was no teaching_,” the Master says—are with the writer. As it was her duty, in the beginning, to answer and explain certain points not touched upon, it is more than likely that, notwithstanding the many annotations on these copies, the writer, in her ignorance of English and her fear of saying too much, may have bungled the information given. _She takes the whole blame for it upon herself in any and every case_. But it is impossible for her to allow students to remain any longer under erroneous impressions, or to believe that the fault lies with the Esoteric system.