(Henes, MI-81-02) NE of Dexter, Webster Township, Washtenaw County, MI. Central St. NE 0.6 miles from jct with Ann Arbor St. in Dexter, continue NE on Mast Rd. 0.4 miles to the house on the E. side of the road at 4360 Mast Rd. (4-29-04, N42° 20.76', W83° 52.46') Photo by Mark Comstock.