This survey was followed by amateuar Antiquarian excavations sponsored in 1886 and 1867 that involved minimal trenching in mounds. For example, the excavation of one Mound consisted of about 3% of one mound.
This survey was followed by amateur archaeological digs in 1886 and 1867 that involved minimal excavation at mounds. For instance, one mound's excavation took up about 3% of the mound itself.