[Mithadan]

I will return later to discuss more of Huinesoron's excellent list, and will post now to address the Gondolin swords.

Glamdring was Turgon's sword. Assuming that the account found in Lost Tales is, in some form, the final version, Turgon retreated into his tower and died when the tower was brought down during the assault. This seems to be confirmed in The Silmarillion ("the tower was overthrown; and mighty was its fall and the fall of Turgon in its ruin."). Thir presents an intriguing scenario. Morgoth's forces did not merely destroy Gondolin, grab what spoils were readily available and leave. They took the time to dig through the rubble and thus find Turgon's sword where it was buried.

There has been significant speculation about Orcrist. Some suggest that it was Ecthelion's sword. Lost Tales suggests that he was wounded and dropped his sword, before impaling Gothmog on the spike of his helmet. This is a guess, at best.

How did the Trolls end up with the swords? This question can be resolved only via speculation. Elrond suggests that the Trolls plundered "other plunderers" or found a hidden cache of valuables. Where this may have taken place is unknown. Spoils buried in Angmar? A cache in Moria? My hesitation regarding the last is that the trolls in The Hobbit were northern hill trolls, not the cave-trolls present in Moria.