"A niece of Einstein’s, in India during the 1960s, paid a special visit to the headquarters of the Theosophical Society at Adyar. She explained that she knew nothing of theosophy or the society, but had to see the place because her uncle always had a copy of Madame Blavatsky’s Secret Doctrine on his desk. The individual to whom the niece spoke was Eunice Layton, a world-traveled theosophical lecturer who happened to be at the reception desk when she arrived."
January 1, 1970
https://en.wikiquote.org/wiki/The_Secret_Doctrine