The Mystery of Satan, 1973 Blavatsky Lecture, England, Internet Archive
The Yoga of the Serpent Fire, 1954 Blavatsky Lecture, England, Internet Archive
Indications of a New Culture, 1934 Blavatsky Lecture, England, Internet Archive
Matter is the Shadow of Spirit, 1918 Blavatsky Lecture, England, Internet Archive
The Nature and Function of the Soul, 1946 Blavatsky Lecture, England, Internet Archive
There is No Religion Higher than Truth: Developments in The Theosophical Society, 1963, Katinka Hesselink
Whence Come the Gods? and Related Studies, 1959 Blavatsky Lecture, England, Internet Archive
Point Out the Way: Answers at an "Ocean" Class, early 1930s, ULT - Phoenix AZ
Esotericism of the Popol Vuh, 1948/1979, Theosophical University Press Online Edition
The Olympian Ideal of Universal Brotherhood, 2012 Blavatsky Lecture, England, Internet Archive
Colonel Olcott and the Healing Arts, 2007 Blavatsky Lecture, England, Internet Archive
Creating the New Age: Theosophy's Origins in the British Isles, 2000 Blavatsky Lecture, England, Internet Archive
A Multitudinous Universe: The Blavatsky Lecture at 100, 2017 Blavatsky Lecture, England, Internet Archive
Esoteric Philosophy: The Theosophical Janus, 2008 Blavatsky Lecture, England, Internet Archive
The Reign of the Spirit, 1957 Blavatsky Lecture, England, Internet Archive
On Order and Purpose in Evolution, 1949 Blavatsky Lecture, England, Internet Archive
Brotherhood and the Enlightened Mind, 1952 Blavatsky Lecture, England, Internet Archive
The Campbell Theosophical Research Library