...well, seems possible there's one of them present anyway, right?

A Feanáro can be spared to go along anyway.

And they're off to Literally Random Location! And now they have air and a ship.

"I'm going to check for alts first," Cam says, "suspect they'll be better tour guides than an uninformed corpus grab, sound like a plan?"

He's smiling delightedly. "Yes."

Conjure conjure conjure conjure -

"We both have alts here! ...Mine does not seem to have a stable address, yours will be easier to find."

"Does not seem to have a stable address?"

"He or she has produced recent writing in forty alphabets in as many sections of the universe! I do not know what's up with that."

He looks desperately envious. 

"Nice."

"Well, if we're lucky yours is acquainted and can get us in touch so we can find out how mine is doing that. You're thataway." Cam lines up a course for thataway.

"Much more crowded universe, I take it," he says when they're off.

Conjure conjure - "Ohhhh yeah. This place is up to its ears in sapience."

"Good. I was going to be really disappointed if it was a-handful-of-humanoids-per-universe or something. Can I have my complete works?"

"Cross your fingers that they won't rupture the ship, but -" Yeah, here they are.

"...they're in Quenya."

"What, really?"

"Yup. This is all notes on -" he scrolls through it -

"okay, different magic system - he can stop time in an arbitrary radius, cool!

...less cool than it sounds, it's not like he can move around freely in the stopped area, everything's just - stopped -

- the kids are all all right -

...Melkor had an alt in their universe, too."

"- in their universe? Do they have interdimensional transit too? Also, past tense?"

"Not sure about the interdimensional transit, very sure about the past tense."

"We will have to find how that came about."

"And borrow it," he says fervently. "Want to read through it as well, the content's not particularly private..."

"Sure, if you say so." Peek.

Mostly experimental notes. Logistics. Linguistics papers. Diagrams and so forth. 

The diagrams that aren't obviously related to the local magic system are for low-tech stuff. Swords. Improved bookbinding. A very rough prototype of a printing press.

"He's into swords!" says Cam. "How the fuck do you kill a Vala with swords?"

"Really excellent question! There's a speech, calling for war with Melkor, similar to one I gave, and there's a line in it - 'travel light, but take with you your swords!' - if that's not a metaphor -

- maybe 'swords' are a very sophisticated magical weapon that happens to be a cognate with, like, pointy metal sticks."

Cam displays a diagram of a literal sword.

"...maybe their Melkor was different."