The male testicles are homologous to the female ovaries.

Tularemia, an infectious disease spread by ticks, kills 150 or so people a year in America.

Look in other contemporaneous works to see whether that idea was common then.

At Chaco they had a little earthen fort, with a small ditch palisadoed round it, and a few old honeycombed guns without carriages, and which do not defend the harbour in the least.