This memoir investigates the geological composition and potential for coal extraction within the Lewes and Nordenskiöld rivers district of the Yukon Territory. D. D. Cairnes, a geologist with extensive experience in Canadian resource assessment, presents findings based on field surveys and geological mapping conducted in the region. The work aims to provide a preliminary assessment of the coal deposits, their accessibility, and their economic viability for future development.

This report serves as a foundational document for understanding the coal resources of a specific region in the Yukon. Its value lies in its direct, field-based observations and geological analysis, providing essential data for resource managers and geologists. The work is likely regarded as a key historical reference for the area's resource potential.