This map comes from Field Notes III of the Detroit Geographic Expedition & Institute (DGEI) which had a series of maps and features on the Cass Corridor. The last Cass Corridor map noted the racial differences in Cass Corridor. This map illustrates the racial divide where Black population rarely crossed 3rd Avenue to reside within the Cass Corridor.
The Cass Corridor was considered a “society” neighborhood in the 1860s – 1900s as Lewis Cass sold his farm land and the wealthy began building large Victorian homes there. In the 1960s – 1970s it was considered one of the pockets of White population in the city.
From DGEI’s Field Notes III publication:
“But, physical proximity has done little to bring the white Appalachians of the corridor any closer to blacks socially. Their dislike for each other has a long history, which stretches back to the days when they were both poor in the South. Poor whites and blacks have always had to compete with each other for jobs. An “outsider” may be able to see their mutual hatred as a trick played to keep them from uniting. To them, it is a deeply rooted cultural feeling.”