Ripon College Building Reference Manual: Duffie House: Built by Walter O. Hargrave who lived there before George Duffie. Duffie gave the house to Ripon in 1918; it was torn down in 1972 and is now a parking lot.

Update: New link.

George Williams’ census of Fairwater Wisconsin:

William Hargrave household was Williams’ next entry. Hargraves is identified as a farmer from Scotland with $1200 of real estate, 80-120 acres at average values. The patent records, show a William Hargrave parcel of 160 acres in section 21. The 1862 plat map identifies a 60-acre parcel in section 21 along Sheldon Road and adjacent parcels of 100 acres owned by R. Hargraves and 2 80-acre parcels owned by J. Hargraves. Neither of those two owners is listed in the 1850 census, although it seems safe to speculate that they were related to William. The 1860 census identifies a Robert Hargrave, 6 years younger than William and born in Scotland, as well as a James Hargrave, 11 years younger than William and born in Canada. The Hargrave marker has been placed in section 21, adjacent to Sheldon Road, the site of the William Hargave parcel remaining in 1862.”

More information is available at the Ripon Library site: Hargrave, Walter O. I , Hargrave, Walter O. II, Hargrave, William (PDFs). The Hargrave property was southeast of the current city of Ripon, Wisconsin (overlay below).