At the age of thiry-six in 1852, Lt. Montgomery Cunningham Meigs of the Army Corps of Engineers reported to Washington, D. C., for duty as a special assistant to the chief army engineer, Gen. Joseph G. Totten. It was a fateful assignment, both for the nation's capital and for the bright, ambitious, and politically connected West Point graduate. Meigs's forty-year tenure in the nation's capital was by any account spectacularly successful. He surveyed, designed, and built the Washington water supply system, oversaw the extension of the U.S. Capitol and the erection of its massive iron dome, and...