"When we look at a landscape, we certainly see the open and contemplate the world, with all the elements that make it up (the ancient sources list among these the woods, the hills, the lakes, the villas, the headlands, springs, streams, canals, flocks and shepherds, people on foot or in a boat, those hunting or harvesting . . . ); but these things, which are already no longer parts of an animal environment, are now, so to speak, deactivated one by one on the level of being and perceived as a whole in a new dimension. We see them as perfectly and clearly as ever, and yet we already do not see them, lost—happily, immemorially lost—in the landscape. Being, en état de paysage, is suspended and rendered inoperative, and the world, having become perfectly inappropriable, goes, so to speak, beyond being and nothing." (Giorgio Agamben, Creation and Anarchy)
What does "immemorially" mean here?