This remarkable octagon house, at the corner of Eagle and Hanover Streets, in Marshall Michigan was was built in 1856 by Increase Pendleton. Morgan Alexander, a lumber dealer, purchased the house in 1875 and did extensive repairs which included plastering the exterior stone walls and the addition of decorative trim (brackets and porches.) When I saw it, I nearly had an apoplectic fit!
Information from the book, "Nineteenth Century Homes of Marshall, Michigan" by Mabel Cooper Skjelver. (minus the comment concerning the "apoplectic fir.) A great overview of the homes in a town remarkably rich in architecture.
Rob Robbins reports that it is also FOR SALE!