Book excerpt: Using primary and secondary sources, Wilma Henrickson assembles a collection of documents related to decisive moments in the history of Detroit and the region, spanning the time from before statehood to the present. These were turning points for the region—life for the residents took a new direction, definitely closing off some options while accepting others. Some were brought about by accident; others were made by conscious decision. The consequences of some decisions were immediate, others appeared only after the accumulation of years. Among Henrickson's recurring themes are the destruction of the environment and its natural beauty, the lure of wealth, urban expansion and sprawl and civil rights. Selections include Lewis Cass' position paper on "Indian Removal," Jorge de Castellanos' article of "Black Slavery in Early Detroit," and excerpts from the writings of historian and mapmaker Silas farmer.