five to six o'clock
A paper and ink , quick . '' Hamar obeyed with alacrity . `` On you , '' Kelson wrote , `` is conferred the property of invisibility -- a property common in Atlantis , and still possessed by the Fakirs of Hindoostan , the natives of Easter Island and certain tribes in New Guinea . You must reach grade three in the scale of concentration , by concentrating , from five to six o'clock , every morning , on amalgamating yourself with the ether . You must sit , with your head thrown back , gazing up into space -- allowing nothing to distract your mind . Wholly and solely , your thoughts must be fixed on the ether . This property of invisibility can only be successfully practised , when the third grade in the scale of concentration has been reached .