with a menacing look at the turnkey he crawled upon the hearth, and, peering up the chimney, struck and prised at its sides with the crowbar, and worked at the iron grating across it. in a few minutes, some mortar and dust came dropping down, which he averted his face to avoid; and in it, and in the old wood-ashes, and in a crevice in the chimney into which his weapon had slipped or wrought itself, he groped with a cautious touch.