Taking up the trail again at the Hollywood plantation, near Saint Joseph, Louisiana, in Tensas Parish, we find ten mounds in a circle facing the temple. A few miles southward, facing Natchez, in Catahoula Parish, is another group. Crossing Louisiana, we enter Texas, and from the Trinity to the Colorado River there are millions of mounds, all of a conical form, that have baffled ethnologists for the last fifty years. They are from one to five feet in height, and from thirty to one hundred and forty feet in diameter. All scientists who have examined them have pronounced them the “inexplicable mounds.” During the summer of ’87 and ’88 I have traveled for days among the same mysterious mounds in Texas, stretching in an unbroken line toward the Rio Grande, and have pronounced them “landmarks” that indicated the line of departure of the Mound-builders, in their migration across the treeless prairies. This conclusion brings us to consider the Mound-builders after the migration, in their new home. ------------------------------------------------------------------------ II. The Mound-builders in Mexico. ────── “Nations melt From Power’s high pinnacle, when they have felt The sunlight for a while, and downwards go.” We know that the Mound-builders had a knowledge of Mexico before their southwestern migration, because obsidian was found in their mounds, and this mineral is found only in Mexico. No links are so conclusive in connecting the Mound-builders of the Mississippi Valley with those of Mexico, as the truncated, pyramidal mounds. True to the historical traditions that all great centers of civilization have been along the great river basins, we would naturally turn to the water-courses of Mexico to resume the trend of our narrative, and we are not disappointed.