"Sometimes they jump out of the water but it's hard to get a very good look at them that way. I think around this tech level on Earth whaling was still popular but I guess there could be some reason it isn't here even if there's whales."

"What was it popular for?"

"Whale oil was a clean-burning lamp fuel. Also they used the baleen for some purposes, I think."

"Hm.  That - doesn't sound especially valuable compared to the risk of going out in the ocean, naively?  People die at sea."

"Yes, I can see why you might choose smokier fuels if you don't have to keep the effects of being around the smoke and are immortal."

"Is smoke bad on the scale of candles?"

"I think it's one of those things where there isn't actually a safe dose, but less is not as bad as more?"

"So it probably makes sense to prioritize figuring out electric lighting for you two, even if we can't immediately scale it."

"We sleep at night and don't need candles then but it wouldn't hurt. Uh, badly wired electrical work can cause fires, so it'd have to be developed to a pretty high standard to be less dangerous than candles - which can also cause fires but only in straightforward ways - or stumbling around in the dark or whatever."

"Oh dear."  She has lots of technical questions about how to go about safely building light bulbs and a small generator.

Kyeo doesn't know how to build all the things but he does know the safety rules for working on them, like insulation and which things should never touch which other things and the importance of grounding.

Scrupulous notes are taken on safety rules.  "Is there anything else you have to mind that would make sense to get in place for you two regardless of scalability?"

"Regrettably I don't know enough about medicine to allow more drugs to be derived, let alone responsibly prescribed. If we break bones we'll need them set. If we lose a lot of blood transfusions are helpful but only if you can match blood types - Kyeo, do you know your blood type -"

"O-positive."

"I'm O-neg, so I can donate blood to him but not vice-versa, but you need sterile equipment and suitable needles and syringes or drips."

"Explain blood types?  And how do you make sure something's sterile."

Sarham does his best to explain blood types. "Rubbing alcohol and boiling are low-tech sterilization methods."

Notes notes notes.  "Probably we'll want to devote a day just to medical things, in case there's anything non-obvious that we could in fact derive - I bet we can work out something better for transportation even if we can't get what you're used to - "

"Well, there's always non-electric bicycles, they can also be powered by pedaling."

After some questions about how they're put together, she determines that they can probably get them a couple of bicycles in fairly short order!

"Have you had any trouble so far with - well, I was going to say 'getting around', but actually have you had problems with anything."

"...the water pressure in the showers is pretty low. I don't know how it's normally done at home though. Uh, it would be cool if we could reinvent the safety razor so we don't get scruffy or risk cutting ourselves."

"Safety razors seem like something we could get you unless they're more complicated than they sound.  Is water pressure important for some reason we don't know about?"

"It's not essential or anything but it makes showers pleasanter and rinsing faster. - probably costlier in water, though."

"Hmm.  I don't have the mechanics of pressurized water in my head at the moment either, but - we have plumbing in homes, yes?  And sinks have higher pressure than showers do . . .  I wonder whether it's just an issue with the difference in water volume or - we've had showers longer than in-home plumbing; showers have been around for I think just about all of recorded history, and so maybe it's just that you can install pipes in homes individually for lots of benefit, but since the showers are all centralized and it's not that big of a difference, they haven't bothered to upgrade them?"

"I would expect anyone who did bother to upgrade to get more customers! Unless a not-caring-about-shower-pressure trait has inadvertently achieved fixation in the population."