An Essay on the Druids, the Ancient Churches, and the Round Towers of Ireland. E-book. Formato PDF Richard Smiddy   -  Forgotten Books, 2017  - 

It was once the speech of a vast number of the human race. Probably, it was the first language spoken by man. At the present day fragments of it are found in most countries of the world, even in India and among the original tribes of America. No language has left more extensive.