“There is, however, possibly a serious side to the question, for some of the children, indeed all who have been missed at night, have been slightly torn or wounded in the throat. The wounds seem such as might be made by a rat or a small dog, and although of not much importance individually, would tend to show that whatever animal inflicts them has a system or method of its own. The police of the division have been instructed to keep a sharp lookout for straying children, especially when very young, in and around Hampstead Heath, and for any stray dog which may be about.”