Killed the first silver knight and saw the shortcut was closed. Okay. I climbed the stairs to jump off and saw "something" enter the room to the right. If you know what I was attempting, you know what I mean.
It didn't make any sound and it wasn't wearing the hush ring or using the spell. It wasn't the Host, but it was semi-solid. It wasn't an invader, either.
I suppose it could have been another summoned player; that makes sense. The Host was invaded and killed before I could open the shortcut. I didn't see another player in the room, but I suppose it is possible s/he was sent back to their world before I was.
Now I'm alone in Anor Londo with only Solarie for company. I'm scared. REALLY scared. Scalp tingling scared.