The Sixth Sense by Charles Henry Brent

This book was planned and promised to the publisher more than three years ago. Exacting duties have compelled the writer from time to time, to defer the completion of his undertaking. The delay has been profitable in that it has afforded opportunity for the study of recent works on kindred topics, which in some respects has modified and in some enlarged the original conception of the subject in hand. A long ocean voyage at last has provided the quiet in which to write out these thoughts.