In the first chapter, Lucy "kept her head and kicked off her shoes, as everyone ought to do who fall into deep water in thier clothes." Later in that chapter it says the extra "shoes, sandals, and sea-boots were hopelessly big but she did not mind going barefoot." However, in chapter nine, Lucy had " a little stone in her shoe" and "sat down to take off her shoe. Her lace had got into a knot." From where did these new shoes come?