The sad effects of sin : A true relation of the murder committed by David Wallis, on his companion Benjamin Stolwood: on Saturday night, the first of August, 1713. With his carriage ofter condemnation; his confession and dying speech at the place of execution, &c. : To which are added, the sermons preached at the lecture in Boston, in his hearing, after condemnation; and on the day of his execution, being Sept. 24. 1713.