"Oh. Oh dear," a croaky voice said. "You've brought someone with you. You never said you were bringing guests today children. Oh, dear me. Look at the state of me. Look at the state of the tree " Bea and Bertie looked to the ground and saw a great round wombat fussing around the bottom of the tree. His wiry hair was all in a tussle and his lovely pink nose was smudged with dirt from pushing fallen gum nuts into a pile. This is no ordinary...