"For thirty years, from 1910 to 1940, Angel Island in San Francisco Bay was the first, often the only, toehold in America for immigrants from China. From the Cantonese Pearl River delta district of Taishan they sailed, fleeing famine and the foreign concessions, bound for the Land of the Flowery Flag, the Golden Mountain. Some were relatives of earlier Chinese immigrants who had come to America for Sutter's gold and stayed to help lay transcontinental...