The modes of origin of lowest organisms including a discussion of the experiments of M. Pasteur

Life and Matter: A Criticism of Professor Haeckel's "Riddle of the Universe"

Les énigmes de l'Univers

Evolution of Life and Form Four lectures delivered at the twenty-third anniversary meeting of the Theosophical Society at Adyar, Madras, 1898

The Wonders of Life: A Popular Study of Biological Philosophy

Life's Dawn on Earth Being the history of the oldest known fossil remains, and their relations to geological time and to the development of the animal kingdom

Relics of Primeval Life: Beginning of Life in the Dawn of Geological Time