My understanding is that business leases have quite a bit less of protection than residential leases, but I would be extremely surprised if a landlord can toss out a tenant on three days' notice even in the absence of a written agreement.

If she wasn't comfortable staying, and she agreed to move, then the matter is basically resolved, except for one thing: the owner of prime retail space in the center of the community has a responsibility to that community to behave within the parameters of the law. Failure to do so reflects badly on the community and will make new tenants less likely to do business in Davis Square.

But for all we know, this isn't what happened at all. People "agree to leave" and then claim they got kicked out all the time.