From the record
“Sleeper House is a private house in Bad Axe, Michigan. It was listed on the National Register of Historic Places in 1972.”
Wikipedia article Albert E. Sleeper House, CC BY-SA 4.0.
One of 27 National Register listings published here for Huron County · listed in 1972 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service