Page 577. Red bricks were made by John Zennder some ten years ago about a mile west of Long Prairie village, in the S. W. 1/4 of the N. E. 1/4 section 19, and
Page 578. also on his farm two miles southeast from this village. They were made from the till or boulder-clay, and were of poor quality, being cracked by particles of lime due to the limestone gravel in the till. (A Report on the Geological and Natural History Survey of Minnesota, 1882-1885, The Geology of Minnesota, Volume II, N. H. Winchell and Warren Upham, Pioneer Press Company, St. Paul, Minnesota, 1888)
Two miles west of Long Prairie a brick yard has made use of some small deposits of this sort for a common red brick. The deposits are nearly worked out and it is not likely that others will be started as no others are so easily accessible. (Clays and Shales of Minnesota, Frank F. Grout and E. K. Soper, The University of Minnesota, Minneapolis, Minnesota, 1914, Page 162)