From the top of its tree, resumed the figure triumphantly, "the squirrel had seen what was happening, and made its great discovery. It realised why the ground was wetter and wetter every day, and also why the island was small and growing smaller. For it understood the awful fact that--the sea was rising! A little longer and the entire island would be under water, and everybody on it would be drowned!" "Couldn't none of them swim or anything?" asked Judy with keen anxiety.