If you use Google Maps (http://maps.google.com), you can input 160 Washington Street, Sherborn and see the cul-de-sac shortly after Western Avenue.
I checked the showing instructions and, while they are accompanied showings with the listing agent, there are no time restrictions.
I'd be happy to provide you with more information and/or set up a showing to see this spectacular home.
Feel free to email me direct or give me a call.
Century 21 Commonwealth
29 Washington Street
Wellesley, MA 02481
Have a good day!