The book is an historical description, and analysis, of the immigration of Puerto Ricans (aka: Porto Ricans from 1898-1932) to California (from 1850-1925), as well as to the then Territory of Hawaii (from 1900-1925). This book adds another chapter to the broad subject of American Ethnic History and Immigration to the United States, as well as to its then Territory (Hawaii). It identifies, among other things, the names, occupations/professions, spousal names, year of immigration, etc., for the first Puerto Ricans to California from 1850-1900, initially in small numbers (i.e., a total of 12), and thereafter, the names, etc., of at least 151 persons, who immigrated to both California, and to Hawaii, utilizing the genealogical-related software, Ancestry.com, which "extracted" the names from the 1852 (The 1852 State of California Census), and from the U.S. Federal Census from 1860, 1870, 1880, 1900, and 1910. The book describes, and explains the economic, social and geographic (i.e., the devastating 1899 Hurricane) reasons that created the conditions for why Puerto Ricans felt compelled to emigrate from Puerto Rico to then better their life chances, either in California, and/or in Hawaii. Puerto Ricans began to immigrate to California, "en mase", beginning on December 14, 1900, whereby a total of at least 64 persons (and not 56, as had earlier been written) "involuntarily decided" to remain in California, and were subsequently "dispersed" throughout Northern California. This immigration to both California, and to Hawaii formed the basis for the evolution of the first Puerto Rican "colonias", i.e., enclaves and then communities, in both California and in Hawaii.