From Wikipedia, condensed:  “The Octagon House, also known as the Octagon House Museum or the John Richards Octagon House, was built in 1854 and was listed on the National Register of Historic Places in 1971. It is one of many octagon houses built in the United States in the mid-19th century.”  The unused E.C. Kropp card 4976N has an unusually detailed caption, right down to how much bread the oven could handle.  Impressive.  Grade: 1