"From 1850 to 1930 America witnessed a unique emigration and resettlement of at least 200,000 children and several thousand adults, primarily from the East Coast to the West. This 'placing out, ' an attempt to find homes for the urban poor, was best known by the 'orphan trains' that carried the children. Holt carefully analyzes the system, initially instituted by the New York Children's Aid Society in 1853, tracking its imitators as well as the reasons...