There is a continuous progress in all things; a fact which we know only after we get hold of the clue.  And so, when Mrs. Mary Blyth appeared as Mrs. Mary Dodds, in room of the domesticated Jenny, it was in perfect accordance with the law of cause and effect.  No doubt they did their best to be happy, as all creatures do, even the devil’s children, only in a wrong shaft; but they had made that fearful miscalculation, which is the wages of sin, when they counted upon conscience as a pimp to their pleasures, in place of a king’s-evidence against them, that king being the Lord of heaven and earth.  And so it turned out in the course of several years, that, as their love lost its fervour, their respective monitors acquired greater power in pleading the cause of her who was dead, and convincing them, against their will (for the all-powerful wish has no virtue here), that they had done a cruel thing, for which they were amenable to an avenging guardian of the everlasting element of good in nature’s dualism.  Yet, strange enough, each of the two kept his and her own secret.  Their hearts burned, even as the fire which consumes the wicked, under the smother of a forced silence—­itself a torment and an agony; yea, neither of the two would mention the name of Jenny Dodds for the entire world.  And there was more than a mutual fear that one should know what the other thought.  Each was under a process of exculpation and inculpation—­a mutual blaming of each other in their hearts, without ever yet a word said to indicate their thoughts.  It was the quarrel of devils, who make the lesser crime a foil to show the greater, and call it a virtue for the reason that they would rather be the counterfeits of good than the base metal of evil; yet with no advantage, for hypocrisy is only the glow which conceals the worm in its retreat within it.  The plea of the wife was, that she was courted by the man, and that although she might have wished Jenny out of the way, and hinted as much, she never meant actual murder; while his, again, was the old Barnwell charge, that his better nature had been corrupted by the woman, and that he did it at her suggestion, and under the influence of her siren power.  They thus got gradually into that state of feeling by which the runaway convicts from a penal settlement were actuated, when, toiling away through endless brakes and swamps where neither meat nor drink could be procured, they were so maddened by hunger, that each, with a concealed knife under his sleeve, watched his neighbour for an opportunity to strike; nor could one dare to fall behind, without the suspicion being raised in the minds of his companions, that he was to execute his purpose when they were off their guard.  So like, in other respects too; for these men, afraid to speak their thoughts of each other, journeyed on in deep silence, and each was ready to immolate his friend at the altar of selfishness, changed into a bloodthirsty Dagon by the fiends Hunger and Thirst.