"'On the seventeenth [of February, 1828], we set out with the determination of examining more thoroughly the chasm of black granite into which we had made our way in the first search' (this, you will recall, was on the last island upon which they set foot before being driven by winds and ocean currents farther south. They were then in hiding from the barbarians of that island, and were only a few hundred miles from the South Pole). 'We remembered that one of the fissures in the sides of this pit had been partially looked into, and we were anxious to explore it, although with no expectation of discovering here any opening. We found no great difficulty in reaching the bottom of the hollow as before, and were now sufficiently calm to survey it with some attention. It was, indeed, one of the most singular-looking places imaginable, and we could scarcely bring ourselves to believe it altogether the work of nature.' He proceeds to explain that the sides of the abyss had apparently never been connected, one surface being of soapstone, the other of black marl. The average breadth between the two cliffs was sixty feet. Here are Pym's own words again: 'Upon arriving within fifty feet of the bottom [of the abyss], a perfect regularity commenced. The sides were now entirely uniform in substance, in color and in lateral direction, the material being a very black and shining granite, and the distance between the two sides, at all points, facing each other, exactly twenty yards.' The diary goes on to state that they explored three chasms, and that in a fissure of the third of these Peters discovered some 'singular-looking indentures in the surface of the black marl forming the termination of the cul-de-sac.' It is surmised by Pym and Peters that the first of these indentures is possibly the intentional representation of a human figure standing erect, with outstretched arm; and that the rest of them bore a resemblance to alphabetical characters--such, at least, it seems from Pym's diary, was the 'idle opinion' of Peters. [Footnote: See Narrative of A. Gordon Pym, in any complete edition of Poe's Works.] "Pym later had a clew to the meaning of these characters, and no doubt recorded the facts in a later diary, many of the pages of which Poe never saw. But if Pym and Peters had analyzed more closely the indentures, they might have gained at least the shadow of an idea of the meaning of these representations. Pym made a copy of them, as you know, and Poe here gives us a fac-simile of that copy in his Narrative. Peters now knows in a general way of what these indentures were significant, and I will in a moment explain to you their general meaning; but first look at this fac-simile." I drew up my chair to the side of Doctor Bainbridge, and together we looked at the representation of these indentures which Poe has furnished us. Bainbridge continued: