This book investigates the historical development and economic significance of the Cobalt, Porcupine, and Kirkland Lake mining areas in Ontario, Canada. Michael Barnes, drawing on extensive archival research and historical accounts, presents a detailed examination of the boom-and-bust cycles, the key figures, and the technological advancements that shaped these vital mining districts. The work aims to illuminate the complex interplay of geology, capital, labor, and entrepreneurship that defined these regions and their contribution to Canadian economic history.

This book is recognized as a significant historical account of Ontario's key mining regions. The detailed research and comprehensive scope suggest it serves as a valuable resource for historians, geologists, and those interested in Canadian economic development. Its focus on the specific histories of Cobalt, Porcupine, and Kirkland Lake provides a focused yet broad perspective on the era of mineral resource expansion in Northern Ontario.