"During the course of this correspondence which extended over the years 1880 to 1884 Mr. Sinnett received many letters from The Mahatmas M. and K.H., the Teachers in question, and it is these original communications which are published in the present volume under the title of " The Mahatma Letters." The circumstances attending their receipt were fully dealt with by Mr. Sinnett in his Occult World and they need not therefore be restated here."