In the 1920s, there was a flurry of archaeological activity in Michigan to record and catalog Native American villages, garden beds, and burial mounds. As a result, the entire Saginaw Valley has 100s of identified sites. The identification, and looting, of Indian artifacts from burial mounds, was a common occurrence.
Archives of Michigan is now in possession of a collection of Ora Labora letters written in English and Old German by Emil and Bertha Baur and other family members. They were found in Cincinnati in 1974 and sent to the Historical Society of Michigan in 2018. They are in process of being prepared for availability online