"...the Valar sorta didn't let them."

"If the Valar didn't let them leave they wouldn't have been here. Or you'd have already fought your way past the Valar and then you'd have a better sense of whether you can go visit Angband safely."

"It was a huge mess but it did not involve me fighting Valar," Cam says, "I probably wouldn't summarize it accurately or charitably, but 'let' is not how I would describe the thing the Valar did."

"Okay. I will write if further questions come to mind."

"Sounds good."

And they set to work moving their supplies.  No one even blinks at Cam; apparently the announcement went over well enough. 

"Anything else I should do while I'm here that isn't providing things that go boom?"

"Do you do hospitals? We have a lot of wounded."

"...my medical training is in a species that responds completely differently to medicine but if you need, like, blood for transfusions, or you have amputees, I expect to be able to help there unproblematically?"

"We do have those, but people aren't dying of either problem; perhaps we'll relocate them to a centralized location to save you some time. I am really very reluctant to delay you in figuring out whether to help with the war. We lost fifty thousand people yesterday."

"Christ. Okay. I'll get a move on."

"Thank you. What's Christ?"

"Fictional deity commonly sworn by in my native language. I'll check for letters once a day," he says, and he takes off and goes for his shuttle.

It's undisturbed where he left it. 

And he heads for the place that is difficult to head for.

And the ship would rather go somewhere else and his eyes keep wandering but it's not that hard to correct for and soon he's at the edge. 

He hops out.

"Excuse me!" he calls. "I cannot osanwë you because I am not the correct kind of cyborg but I am a visitor from another world and it was suggested I come here!"

And for a minute there's silence, and then a door opens in the very solid very tall concrete wall. There wasn't a visible place for a door. They're now right in front of him. 

"Hello? We don't speak any Quenya here..."

Cam pulls up his translator. "Is this better?"

"Yes. Are you from Valinor?"

"No, I've visited the place only briefly. I'm from another dimension."

"All right. Why are you here?"

"I'm trying to figure out to what extent and in what way I should best oppose the Enemy."

"We would be happy to aid you in that but you might want to be more specific."

"I can make things. 'Things' is 'not antimatter' and 'not minds' but otherwise fairly arbitrary. I am also personally indestructible."