He is known to have begun work as a clerk with the State Department. He moved to Washington, D.C. in 1800 along with the government, and he was still there in 1814 when he saved the Declaration of Independence and other papers from being burned by British forces.
Mineral oils and coolant from cars pollute the water and kill fish, frogs and other aquatic species. These substances can also harm the wildlife that eats those species.