John Hart, of Northfield, will make brick for L. F. Irish, at Pine Island, Minn., this year. (Clay Record, Clay Record Publishing Company, Chicago, April 29, 1897, Volume X, Number 8, Page 24)
L. T. Irish and Jno. Hart contemplate going into the brick business at Pine Island, Minn. They expect to make 1,000,000 brick this season. (The Clay Worker, T. A. Randall & Co., Indianapolis, March 1899, Volume XXXI, Number 3, Page 288)
Mr. I. F. Irish, of Pine Island, Minn., will furnish 80,000 brick to be used in Zumbrota, and several thousand for building purposes in West Concord. (Brick, Windsor & Kenfield Publishing Company, Chicago, IL, January 1900, Volume XII, Number 3, Page 143)
At the town of Pine Island the loess is exposed to a depth of 5 or 10 feet over a very large territory. The deposit was worked up to about 6 years ago, and produced a fair quality of red brick, but there is not much local demand for the product. (Clays and Shales of Minnesota, Frank F. Grout and E. K. Soper, The University of Minnesota, Minneapolis, Minnesota, 1914, Page 110)