Page 171. A lake deposit is formed along the shores of Lake Mary, 6 miles

Page 172. from the station of Howard Lake (southeast). The material is mixed with coarse sand available in the same neighborhood. Soft-mud red brick are manufactured at the rate of 250,000 per year. (Clays and Shales of Minnesota, Frank F. Grout and E. K. Soper, The University of Minnesota, Minneapolis, Minnesota, 1914)