[Leonardo's been mostly listening to everyone else, rather than actively participate in any of the conversation. When it dies down a little, he finally decides to respond to Tim.]

... then it is clear that our guest did not arrive by ship, if you have found nothing. But how, then? He is dodging questions of how by saying that there are many ships that have sunk on the atolls... but no sign of wreckage? That seems impossible. So it must be by some other means.

[He pauses to let that sink in a little, before adding:]

I asked him outright whether it was a ship that brought him here, just now. He asked how else he would have. When I... mentioned that it could have been by Liminal portal, since that was how we arrived in this world, he simply said, "I have never traveled through a portal".