[Galadriel]

I'm sorry, but currently I'm too lazy to browse through the whole Silmarillion again to find this out so...

Approximately after how many years did Maglor and Maedhros let the twins go? And where did they go, if they did? Were they handed over to someone else? And while they were together, did they roam around Beleriand or live with Maedhros and Maglor up North-East? Or did they just stay in Sirion?

Another thing: Can half-elves fall ill? Like get coughs and colds etc.? Where is this written?

Thank you so much!