They were standing on the edge of a steep， narrow valley at the bottom of which ran.at least it would have been running if it hadn‘t been frozen.a fairly large river. Just below them a dam had been built across this river， and when they saw it everyone suddenly remembered that of course beavers are always making dams and felt quite sure that Mr Beaver had made this one. They also noticed that he now had a sort of modest expression on his face.the sort of look people have when you are visiting a garden they’ve made or reading a story they‘ve written. So it was only common politeness when Susan said， “What a lovely dam！” And Mr Beaver didn’t say， “Hush” this time but， “Merely a trifle！ Merely a trifle！ And it isn‘t really finished！”
