The Charles River runs through the city. I saw Haruki Murakami run several marathons in Boston. I think running a few kilometers along the Charles River in spring is the happiest thing. Today, the streets of Boston are crowded with young people wearing green T-shirts. After dinner, I chatted with the hotel waiter and learned that today is St. Patrick's Day, which is to commemorate St. Patrick, the patron saint of Ireland. I walked a section of the Freedom Road in the cold wind, measuring the city with my feet and touching the things that happened hundreds of years ago under these buildings.