“THE FACT WHICH INTERESTS us most,” wrote Henry David Thoreau, having paddled a pair of rivers and pondered countless facts on a week’s canoe trip, “is the life of the naturalist. The purest science is still biographical.”
Writing in the 1840s, he would have meant the American naturalist of the hundred-odd years just past: the lone and footloose observer, the collector, the explorer who set out to catalog the wild contents of the new continent. A soloist, let’s say, in the symphonic exertions of science, without whose work we could not today have known what too soon was gone, wiped out, from that primal world. A scientist first, the naturalist emerges also as a romantic figure, contending with heat and cold, hunger, claw and venom—not to mention, early on, encountering…
