The J. R. Ritman Library in Amsterdam, Bibliotheca Philosophica Hermetica, has an online exhibition on Mme. Blavatsky’s secretary, G.R.S. Mead. Mead and the Echoes from the Gnosis focuses mainly on his pioneering series of Gnostic texts, eleven little books that comprised Echoes from the Gnosis, issued by the Theosophical Publishing House in London, 1906-1908, but there are examples of his other published studies as well. The set has been republished since then, most recently by Quest Books in America under one cover, and Mead has his own volume in the Western Esoteric Masters series of anthologies edited by Nicholas Goodrick-Clarke. The online exhibition, including the photo above, can be seen here.