Horrid murder!! [electronic resource] : sketches of the life of Capt. James Purrinton, who on the night of the eighth of July, 1806, murdered his wife, six children, and himself : with a particular account of that horrid catastrophe : to which are subjoined, remarks on the fatal tendency of erroneous principles, and motives for receiving and obeying the pure and salutary precepts of the Gospel