*****ADDENDUM: As soon as he saw the Roberts Point post, Terry DeWan sent me a link to the Olmsted archives on Flickr, where the firm has posted 35 plans, sketches, and topographical surveys of the Good Hope project, most dated 1964:
So it looks like my past life as a landscape architect is still coming in handy. Thank you, Terry!
Also found an album of photos from the Olmsted firm: https://www.flickr.com/photos/olmsted_archives/albums/72157647973682622
