Since we share a planet and the same plane of reality, it is fundamentally immaterial to ask if something is 'here' or 'there', the Deltics were always connected to us and thus always here, even if there physical attribute was there. They are thus Schrodinger's product, neither here nor there, but instead existing in both states at once. I could go on, but that is a rather large crowd of armed fellows rapidly approaching me, so I shall take my leave, good day.