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

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

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

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

The Wonders of Life: A Popular Study of Biological Philosophy

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