The Enchanted Stream
The Enchanted Stream is a black, fast-flowing river that cuts directly across the forest path through Mirkwood, a place of deep peril and enchantment. Beorn, the skin-changer, had specifically warned the company about this stream, telling them that its water carries enchantment and a great drowsiness and forgetfulness, and that they should neither drink of it nor bathe in it. The stream is described as black and strong, and its appearance in the gloom of the forest marks a significant obstacle and a point of no return for Thorin and Company.
Appearance and Crossing
The stream is not wide, but it flows fast and strong, blocking the path entirely. A rotted wooden bridge had once spanned it, leaving only broken posts. The company, guided by Bilbo's sharp eyes, discovers a small black boat on the far bank. Using ropes and hooks, they manage to pull the boat across and ferry themselves over in groups. The crossing is tense and difficult, and it is during this operation that disaster strikes. A hart, a flying deer, charges through the company, bowling them over. In the chaos, Bombur, the fattest of the dwarves, stumbles and falls into the dark water. He is pulled out, but the water's enchantment takes immediate effect: he falls into a deep, enchanted sleep, smiling and utterly unresponsive, a burden the company must carry for days.
Consequences and Aftermath
The crossing of the Enchanted Stream has profound consequences. The loss of the boat makes it impossible to go back, and the company is now irrevocably committed to the deeper, darker parts of Mirkwood. Bombur's enchanted sleep becomes a heavy physical and psychological burden, slowing their progress and draining their morale. The event also signals a shift in the forest's character; after crossing, the path seems to straggle on just as before, but the company is now drawing nearer to the eastern edge, though they do not know it. The hunt and the appearance of white deer that follow are signs that they are approaching the realm of the Wood-elves, and the stream itself serves as a boundary between the outer, more passive dangers of the forest and the active, magical threats that lie ahead. The stream's enchantment is a direct manifestation of the forest's hostile magic, a warning that the natural rules of the world outside no longer apply.