The first of the trilogy, the AUTOBIOGRAPHY OF AN ANDROGYNE, was published in January, 1919. In the following June, I began a supplement, THE FEMALE-IMPERSONATORS. Before September, I began to submit it to publishers. But they refused to do anything [Sidenote: _Enemies of Truth and Justice._] toward ameliorating the condition of the world’s most oppressed class. It seemed to be their opinion that the world must have its scapegoat—to punish, vicariously, for the world’s own sins. For centuries, sexual intermediates had served the world in that capacity. After I had peddled the script around for two years to a total of ten regular book publishers, the MEDICO-LEGAL JOURNAL, publisher of my first book, consented to make the work available for those interested. The long delay in publication was utilized by myself in improving the form. The third of the trilogy, THE RIDDLE OF THE UNDERWORLD, has been elaborated simultaneously with THE FEMALE-IMPERSONATORS. Into the latter, I put the “milk for babes” (in St. Paul’s language); into the former, the “meat for strong men.” I wrote the latter in a popular style because addressed primarily to the general reader; the former more in the style suitable for scientists. In my AUTOBIOGRAPHY, I was almost exclusively occupied with a frank exposition of what life meant to me personally. In the two supplements, I have been chiefly occupied in depicting characters with whom I associated in the Underworld. The Bible says: “Man is altogether born in sin!” But in Christendom this is really true of only the one-tenth of the race who people the Underworld. The other nine-tenths are comparatively saints. But there exists no reason for the latter’s prevalent Phariseeism. For the most part their moral superiority is hereditary and environmental. Because of my innate appetencies and avocation of female-impersonator, I was fated to be a Nature-appointed [Sidenote: _Author Repository for Underworld’s Secrets._] amateur detective. I enjoyed entrée to the hearts of both male and female denizens of the Underworld, my stamping-ground when I surrendered my bisexual body to the feminine side of my dual psyche. They would whisper into my ears their innermost secrets. Those who happened to be Roman Catholics (because some whom I met in the Underworld were only chance and rare visitors, and ordinarily able to live up to high ideals) have doubtless revealed the mysteries of their inner life to their priest in the vaguest terms. But with me, because as a rule ignorant of the confessor’s identity and not likely to meet him in Overworld life, the confessions of Roman Catholic, Protestant, Jew, and atheist were detailed and exhaustive. Surely my having been thus favored by Providence ought to qualify me to depict little known human types for those who have missed the opportunity of meeting all kinds of people.