The Mountain lay dark and silent before them and ever higher above them. They made their first camp on the western side of the great southern spur, which ended in a height called Ravenhill. On this there had been an old watch-post; but they dared not climb it yet, it was too exposed.
Thorin sent out a scouting expedition to spy out the land to the South where the Front Gate stood.They marched under the grey and silent cliffs to the feet of Ravenhill. There the river, after winding a wide loop over the valley of Dale, turned from the Mountain on its road to the Lake, flowing swift and noisily. Its bank was bare and rocky, tall and steep above the stream; and gazing out from it over the narrow water, foaming and splashing among many boulders, they could see in the wide valley shadowed by the Mountain's arms the grey ruins of ancient houses, towers, and walls.
They did not dare to follow the river much further towards the Gate; but they went on beyond the end of the southern spur, until lying hidden behind a rock they could look out and see the dark cavernous opening in a great cliff-wall between the arms of the Mountain. Out of it the waters of the Running River sprang; and out of it too there came a steam and a dark smoke. Nothing moved in the waste, save the vapour and the water, and every now and again a black and ominous crow. The only sound was the sound of the stony water, and every now and again the harsh croak of a bird.
They moved their camp then to a long valley, narrower than the great dale in the South where the Gates of the river stood, and walled with lower spurs of the Mountain. Two of these here thrust forward west from the main mass in long steep-sided ridges that fell ever downwards towards the plain.

Silently, clinging to the rocky wall on their right, they went in single file along the ledge, till the wall opened and they turned into a little steep-walled bay, grassy-floored, still and quiet. Its entrance which they had found could not be seen from below because of the overhang of the cliff, nor from further off because it was so small that it looked like a dark crack and no more. It was not a cave and was open to the sky above; but at its inner end a flat wall rose up that in the lower I part, close to the ground, was as smooth and upright as mason's work, but without a joint or crevice to be seen.
No sign was there of post or lintel or threshold, nor any sign of bar or bolt or key-hole; yet they did not doubt that they had found the door at last.
[They] tried without resting to discover where exactly in the smooth face of the rock the door was hidden. They had brought picks and tools of many sorts from Lake-town, and at first they tried to use these. But when they struck the stone the handles splintered and jarred their arms cruelly, and the steel heads broke or bent like lead. Mining work, they saw clearly was no good against the magic that had shut this door; and they grew terrified, too, of the echoing noise.
Bilbo found sitting on the doorstep lonesome and wearisome-there was not a doorstep, of course, really, but they used to call the little grassy space between the wall and the opening the "doorstep" in fun, remembering Bilbo's words long ago at the unexpected party in his hobbit-hole, when he said they could sit on the doorstep till they thought of something. And sit and think they did, or wandered aimlessly about, and glummer and glummer they became.