S. & J. W. Koop’s brick yard at Brainerd, Minn., has been started up for the season. (Clay Record, Clay Record Publishing Company, Chicago, IL, June 27, 1899, Volume XIV, Number 12, Page 23)

Brainerd. Brick Yards. – S & J. W. Koop. First Inspection 1899. Adults – Male - 9. Total No. Employed - 9. No. Hours Labor Each Day - 10. Average No. Weeks Employed in Year - 24. (Seventh Biennial Report of the Bureau of Labor of the State of Minnesota, 1899-1900, Pioneer Press Company, St. Paul, Minnesota, 1900, Page 125)