Two MoonsBy: Thomas Mallon Its the spring of 1877 in Washington, D. C., and at the U. S. Naval Observatory, great changes are afoot: historical, romantic, and scientific. When the brilliant Cynthia Maya Civil War widow whose beauty has been shadowed by worry and povertystarts work as a human computer at the Observatory, astronomer Hugh Allison has found just the partner he needs for a radiant, half crazed scheme which will make him live forever in the annals