William Gregg, Marriage with a deceased wife's sister prohibited by the word of God
“ Thus men and women are "near of kin," not by blood only, but also by marriage. Now surely a wife's sister is a near relative, a very near relative, by marriage; and if a man is forbidden to marry any who are near of kin, he is certainly, according to the general law, not at liberty to marry one who is so nearly related as his wife's sister. If it had been forbidden to marry some only who are near of kin, there might have been some room for doubt, but the prohibition is against all who are near of kin; assuredly, therefore, the law, forbids marriage with a wife's sister. ”
