THAT God forbids a man to marry his sister in law has been proved beyond contradiction. To
illustrate the subject and exhibit the arguments with precision, it was judged advisable to ascend to
the first principles of marriage and affinity; to contemplate the evil of Incest - and ascertain the nature and extent
of the divine law, which prohibits that crime. These interesting topics have unavoidably
introduced a variety of observations, which are numerous and diffuse; but which are perhaps not
calculated to afford the same instruction or excite equal conviction in the minds of some readers,
which the same reasoning would produce, when compressed within narrower boundaries. As instruction
and conviction are the primary objects in view, the following summary is annexed.