De Pere of Yesteryear Volume III provides a detailed summary of various family histories, including the Gittins, Halline, Proctor, Kubitz, Creviere, Smits, Bates, Wheeler, Remington, Heyrman, Kuypers, and Dousman families. It also includes historical information about businesses, newspapers, and events in De Pere. This book covers a wide range of topics, from family relationships and marriages to community involvement and significant life events.