Alright, so in the new Thorn 3 Ghost Fragment added in the HoW expansion, we see the last conversation between Dredgen Yor and his Ghost. During the conversation, Yor says to his Ghost (in response to the latter stating that he will not abandon the former: [quote]You will. Or I will carve the Light from your shell and leave the carcass of my first and last friend in the dirt of this [u]dull, red world[/u] for no one to find.[/quote] This means that this conversation takes place on Mars. Also during the convo Yor says that 'Nothing dies like hope. I cherish it," leaving the Ghost to finally realize that who Yor was is truly dead. Soon after this is said, the Ghost leaves. Now we switch our attention to the Ghost Fragment: Titan card. This card includes a conversation between the titan Holborn and part of his Host. While Holborn and a few of his men are waiting for some scouts to return, they happen upon a Ghost, flitting about. Holborn introduces himself: [quote]/ Well, any servant of the Light is welcome among us. We are Holborn's Host, and I'm Holborn. The City's hand on Mars.[/quote] So Holborn's Host is located on Mars. The Ghost is oddly silent, and is lacking a Guardian. Another titan, possibly named Tibon, remarks that this Ghost reminds him of [quote]/ The time Ghosts from Jagi's Host came back without them. Remember - they got in that fight at some point east of the Caspian? Seven Ghosts, damn near silent, buzzing with some sort of corruption. Drifting back to the Tower, one by one. Scared the Speaker well enough.[/quote] This Ghost has obviously seen some shit, and is silent and possibly a bit insane because of it. Now what could do that to a Ghost? Possibly losing its Guardian to the Darkness. That's right. I believe that after Dredgen Yor's Ghost parted with him on Mars, it wandered the sands until it was found by Holborn's Host. This would also put a rough timeline on when Yor lived. At least one of the Host was present at Twilight Gap, and Ikora Rey had recently become the Warlock Vanguard. [b]TL;DR[/b] The Ghost found by Holborn's Host on Mars is none other than Dredgen Yor's Ghost