I'm currently writing the outline for this one starting in the evening with Estel getting a lesson in Astronomy when our White Council Rep arrives. I'm also tentatively making that Rep Glorfindel so that we have something in writing for now. Discuss.
Rog was the name of one of the leaders of one of the 12 Houses of Gondolin in the original Tale of the Fall of Gondolin. Christopher Tolkien (quite fairly) points out that it was a name that would have been changed in the later version, had that ever been rewritten. (He's the one who fought and died outside the walls of the city.) Personally, I equate him with Enerdhil, the smith of Gondolin who made the original elessar: http://tolkiengateway.net/wiki/Enerdhil