As to disease, there is evidence of only four conditions, namely:
Periostitis, osteoperiostitis, arthritis, and arthritis deformans;
and of these four the first two and again the last two are closely
related, being really only degrees or varieties of the same processes.
It is quite possible that all four conditions are merely differing
manifestations of arthritis. There is no well-founded suspicion of the
existence of syphilis in the tribe, and there is no trace of either
rachitis, tuberculosis, or tumors of the bones. (Dental caries will be
referred to under Teeth.)
We may now approach the more strictly anthropological observations.