Martin I. Townsend,
Prehistoric Structures of Central America…
“ Even those men who made such acquisitions of knowledge as were possible in that day, could only learn from the lips of their imperfectly trained teacher, and by travel to those countries which the barbarous condition of the world allowed them to visit; and even after the learned men of the Greek Islands came to know the power of letters, how small must have been the amount of knowledge existing in the world, and how slow must have been its spread amongst the untaught commonalty of the then Greek world? ”
