Back to Jacob’s identity…
Can Richard communicate with Jacob in 1954? Probably not. But he knows who Jacob is, as he reacts to Locke telling him ‘Jacob sent me’.
Jacob seems to exist in the 1954 skip of the island. This is prior to Horace arriving with Dharma or Christian Sheppard arriving on 815 (dead OR alive)… So this seems to discount theories that either of these are Jacob.
Of course time is relative… But I am favoring more and more the possibility that Jacob was on the island prior to anything we have yet seen on the show. The clue to that is the period costume on the person we see in a flash the first time Locke visits Jacob’s cabin. Either he is linked to the Black Rock or Jacob is just a name someone stuck to a powerful presence, or to the island itself.
Maybe Horace (the mathematician) calculated a specific time and place on the island where he could build an artifact that would allow mere mortals to communicate with Jacob more effectively (like a telephone booth). He built the cabin (perhaps telling his Dharma superiors that he was building a retreat where he could work in peace and quiet). Then at a specific time Jacob’s presence showed up to inhabit the cabin. While it was there Horace spread a line of (possibly volcanic) Ash to contain it and render it inert.How this would work is beyond me.
The cabin seems to be a place where people get caught (as in a net). Christian, Claire, the other mysterious presences… In Hurley’s vision we see someone in a chair in the cabin and he is startled by ANOTHER face that suddenly pops up in foreground. This is possibly a second person. Or assuming time and space do not operate the same way in the cabin or on the island, it could be the same person in two places at once or moving at the speed of light from one place to another.
These are probably old ideas to most of you…