"I think I'm glad we don't get sick." 

"Nice deal if you can get it, yeah. Demons don't get sick either."

"Because you're indestructible?" 

"Yup. It's very convenient. Well. Wilbur, you want something to eat and maybe a night of sleep before we attempt resurrecting Benjamin Franklin?"

"I don't need to sleep very much but food would be lovely." 

"Requests or do you just want two-three times as much of what I'm having?"

"Oh, surprise me." 

They will be having lasagna and Caesar salad!

Wilbur has much better de facto tablemanners than his sister but it's not hard to figure out that he hasn't been eating enough lately. 

"What is that? It smells so good..."

"Lasagna. You want a bathtubful?"

"Yesplease." 

Cam makes her a big tub with surfaces a cleaner robot will be able to handle and fills it with lasagna.

Not being a discrete object, she doesn't eat it as neatly as she ate the cows, but the mess that exists until she's managed to scrape all the sauce off herself and lick it off her tentacles is much less gory, at least. 

"That," she sighs afterwards, "was the most delicious thing ever." 

"I'm glad you liked it! I'm gonna make a little robot to wash the tub out so future dinners can go there without cross-contamination. Even if not getting sick also applies to food poisoning it seems the way to go." He sets a Scrubba™ on the rim of the tub. It scrubbas its way down.

"I don't get sick from bad food but it still tastes awful." 

"Then a good thing the future has cleaner robots." He makes it a charging dock and a cleaning solution refill station for it to find when it's done in the tub.

"What's that? Is that the cleaner robot? What's a robot?" 

"The thing rolling around in the tub is a robot. Which cleans, hence being a cleaner robot. A robot is a machine that behaves autonomously according to a program. The stuff over there is where it will go when it needs more soap and water and electricity."

"The future has so much cool stuff." 

"It does!" Cam makes himself a cup of coffee and looks over the steps of the resurrection ritual again more closely.

It involves a lot of drawn diagrams and invocations of gods, mostly Yog-Sothoth. You have to prepare the ashes a certain way. You can also resurrect someone from a fresh body, which is simpler and doesn't take as long, but is riskier for the resurrectee, mentally speaking. 

Mentally speaking?

There's a lot of flowery language about risks of the person being "diminished in spirit" but not a lot of explanation of what that...means. 

Cam is going to hunt up... all the other written material that was in the author's house at the time the first draft of this book was written... and see if there's any useful notes or primary sources.