George Goudie Chisholm, Philip Lake, Arthur Hassall, Walter Alison Phillips, and Donald Mackenzie Wallace, 1911 Encyclopædia Britannica, Volume 9… (1911)
“ One cannot even speak with assurance of the diffusion of an Aryan civilization. It is at least not certain that the civilization that was spread by the migration of peoples speaking Aryan tongues originated amongst and remained for a time peculiar to such peoples. The utmost that can be said is that the Aryan languages must in their earliest forms have spread from some geographical centre. That centre, however, is no longer sought for in Asia, but in some part of Europe, so that we can no longer speak of any detachment of Aryan-speaking peoples entering Europe. ”
