Wilmington, Delaware, a medium-sized industrial center in the eastern United States, was the site for this study of migration. The report presents some of the major ideas, hypotheses, and findings of a study on recruitment, movement, and assimilation of migrants into Wilmington. Data for the study were obtained from the 1960 census figures and from responses to a questionnaire administered to 311 heads of households with children in 1 of 5 public elementary schools in the city. The specific purposes of this report were (1) to discuss some theoretical problems in the analysis of migration, (2) to describe the course of migration to Wilmington in recent years, (3) to present the rationale and methods of the study, and (4) to offer a reasoned commentary of some of the study's findings. The most persistent finding of the study was the importance of work as a reason for mobility or stability. (DK)