The material in this manual is, so far as known, accessible only in a number of books. Obligation to those from which it has been gathered has not been expressed by references, which must have marked nearly every page, but, instead, a list has been appended which may be consulted if it is desired to verify statements or to study more fully any subject presented.

The object in view has not been to discuss the propriety, or lawfulness, or obligation of any matter referred to, but simply to give information.