Heritage Hill is the neighborhood in Grand Rapids, MI that is home to Frank Lloyd Wright’s Meyer May House and the Mahoney/Von Holst/Wright Amberg House. There is a house-by-house on-line database (similar to the Oak Park Architectural Database) with recent photos, photos from 1969 and historical information for all of the 1,300 houses in the neighborhood.
Most of the information was collected between 1969 and 1970 in a successful bid to win listing on the National Register of HIstoric Places. The original architectural survey cards are part of the database.
Here is the listings for the Meyer May House and the Amberg House