He is not interrupted.

When he starts yawning he gathers up his papers and heads doorwards.

Some people are waiting to escort him back to his house!

"Are you here as bodyguards or to make sure I don't go skipping off?"

So you don't get lost, actually; there shouldn't be danger inside the city, and you're free to go anywhere you like.

"Okay, lead the way."

They take him back.

He sleeps! He wakes up! He solicits breakfast!

He gets breakfast!

And before lunch:

I think I've got a spell that will work. ...Does this thinking things in public thing work if no one was already paying attention to me.

I caught that! You can aim at specific people if you want to make sure they're paying attention to you.

Noted! Where is my cow and ash and workspace?

He sends a mental map.

I could get used to this telepathy thing. Off he goes. Okay, I need the cow restrained so it can't kick me for cutting it - this is why we mostly use sheep, you can breed sheep to be very docile and too small to ruin your day - and something to cut it with and something to catch blood in, other than that I don't strictly need anything other than the blood and the ash and the subject, but she might be more comfortable with my painting her if I did not have to do it with my bare hands, a sponge or rag or something is ideal.

I can arrange all of those things! Osanwë is great, I'd get so much less done without it.

The design I've got calls for marks around her mouth and neck, up to her what her tolerance for getting symbolic substances on her clothes is, I can be professional about it.

Oh, Elves don't have the human taboo on nudity, if it's more convenient for her not to wear a shirt I am sure she won't mind.

It is, yeah.

I will let her know. 

Thanks!

And his supplies and cow-handlers and test subject arrive! She is topless and no one in fact seems to think anything of it.

Convenient! "If this were a sheep I'd cut here," he says, pointing at a cow location, "does that seem right to you?"

Cow-handler thinks so.

He hefts the bowl to get an idea of what it weighs, cuts the cow, collects blood. Tells the subject where to stand, sponges designs on her, and then continues on the floor, spiraling out.

They watch interestedly.