So what would have been the point of a secret meeting?

Why should they want to have a secret meeting in the middle of the night?

"But how did he find out about the secret meeting?"

"Can you suggest a good place for us to hold a secret meeting?"

He goes to a secret meeting in the dark woods.

He'd heard about the secret meetings being held in the doctor's home.

It's supposed to be a secret meeting, but we all know about it.

Figure out a way to find those secret meetings and record them.

It would be an ideal place for a secret meeting.

So he merely said that this was to be their last secret meeting.