Charles Webster Leadbeater was a member of the Theosophical Society, Co-Freemasonry, an author on occult subjects, and the co-initiator, with J. I. Wedgwood, of the Liberal Catholic Church.
"Seeing" of music: a piece by Gounod (from a book Thought-Forms by Annie Besant and C. W. Leadbeater).
"Ultramicroscopic seeing" of matter: the "ultimate" physical atom (from Occult Chemistry by A. Besant and C. W. Leadbeater).
The Manor, Sydney, Australia, where Leadbeater stayed from 1922 to 1929
Koot Hoomi is said to be one of the Mahatmas that inspired the founding of the Theosophical Society in 1875. In Theosophy it is believed that he engaged in a correspondence with two English Theosophists living in India, A. P. Sinnett and A. O. Hume, which correspondence was published in the book The Mahatma Letters to A. P. Sinnett.
Facsimile (a fragment) of the 8th letter from the Koot Hoomi