Note Back to Main Text — Chapter I · ANCIENT AMERICA.

A still more remarkable discovery was made by Mr. Cresson in July, 1887, at Claymont, in the north of Delaware. In a deep cut of the Baltimore and Ohio Railroad, in a stratum of Philadelphia red gravel and brick clay, and in Delaware. Mr. Cresson obtained an unquestionable palæolith, and a few months afterward his diligent search was rewarded with another.[9] This formation dates from far back in the Glacial period. If we accept Dr. Croll's method of reckoning, we can hardly assign to it an antiquity less than 150,000 years.