Yet even in this voyage I had my misfortunes too; particularly that I was continually sick, being thrown into a violent calenture by the excessive heat of the climate.
to a form of furious delirium accompanied by fever, among sailors, which sometimes led the affected person to imagine the sea to be a green field, and to throw himself into it
A delerium occurring from such symptoms, in which a striken sailor pictures the sea as grassy greens and wishes to dive overboard into them