William Henry Holmes,
Ancient art of the province of Chiriqui…
“ No single character and no one group of characters can be relied upon to distinguish the different groups. We must depend, therefore, upon an assemblage of characters or upon one character in one place and another in another place. Observing a number of striking differences in two groups of ware, we arrive at the conclusion that these groups must have been the work of distinct communities; yet we find very marked differences in wares that (through the possession in common of some particular feature) we know to be the work of the same hands. ”
