How Long Did Hilbert Speak?

What’s a good source with more details about the 23 Problems? Were the delegates amazed? Or did the talk become famous later on?

Was it a hot day? Who was in the hall? Did someone disagree?

He only included half the problems in the talk, and the rest were published in the proceedings, right?

I have “The Honors Class” (with a note inserted, by one of the partial-solvers, Yay!) but it doesn’t say much about the speech itself.

I am talking to bright high school students about set theory and logic, and I want to dig in for a little general background, and besides “there was this famous talk” I am falling short.

Can anyone offer some assistance?