https://www.humanreligions.info/tags/madame_blavatsky.html
Human Truth Foundation pages (3):
Theosophy
Spiritualism: 2. Denominations
A Skeptical Take on Psi, Parapsychology and Other Supernatural Phenomenon: 4.2. Theosophy Embraced Every Psi Topic Possible, But Self-Destructed Amidst Scandals and Frauds