BTW, I'm not a big stickler for plot incompatibilities, but could someone explain how the Donkey Wheel was attached to the 'light' source in the cave of wonders? Locationally, they seem to be on different parts of the island. Or is the Donkey Wheel something else altogether?
Damn it Lurker...stop lurking!
That whole donkey wheel thing made no sense to me when they brought it up in the episode with Jacob and MIB. "Oh yeah...I'm going to hook this donkey wheel up into the rock here, then attach the golden light and throw in some water and off we'll go."
I accepted it as a means to get off and move the island in previous episodes, but how it got there just didn't take with me.
This was not explained in detail. You kind of need to combine it with some of what we saw in the Light cavern,
and what we saw in the other wells that there are other access spots to the Light (tho, these do not have access to the "Cork" that contains Hell). In "Across the Sea" the MIB said something about channeling the water" which was an important part of what happened when Des removed the carrot stone --- the streams that funneled water to the pool pretty much stopped flowing. There was no outlet for the pool, either, so the water apparently drained into spots along the hole (the carrot stone didn't take up that whole space), which may have had the effect that whatever was in there couldn't get past the water and/or the stone. Might've been like having a knob lock and a deadbolt on your door. As such, the water was an important part of what kept whatever it was, at bay. I guess their thinking with the wells was to make a small crack in the Light /(and with what we saw when Ben and Locke moved the wheel, the Light is connected to Time), divert some water, and voila. Perhaps the Romans(?) in the time of Mother had observed some phenomena along the lines of the guy who died during the Orchid drilling. They had a theory, that for Mother, hit a little too close to sounding like it'd work. There was also the point made at the time that so many things on-island work by someone just believing
they'll work. At a certain point, you need to take it on faith, and as presented.