Alden Publishing Company of Chicago published their Standard Atlas of Clay County, Minnesota, in 1909. Most of the volume is made up of plat maps of each township showing property ownership, the locations of schools, cemeteries, churches and some farms. The township plats are here for viewing and printing out.
You must have the free Adobe Acrobat Reader installed on your computer to view them.
Click on the links below for each township plat map. The files are fairly large (120k to 180k), it may take 10 to 15 seconds or more to download one.