How long was Clive away from home yesterday?

W: Hello, Clive.
M: Hi, Catherine. Great to see you here. How have you been doing?
W: To tell the truth, I’m very worried about our college final term exam next month. For one thing, I can’t sleep. Do you have any suggestions for dealing with anxiety? You know how I hate exams.
M: I feel sorry for it. I suggest you go out for a picnic with your friends and have a nice sleep at home.
W: Picnic? That’s easier said than done. How can I manage it? Did you do that yesterday? I waited for you here, but you didn’t appear.
M: I’m sorry, Catherine. But I came home quite late yesterday—about half past nine in the evening. Jim and Betty invited me to go for a picnic.
W: Oh, how lovely! And did you like the picnic?
M: Yes, I liked it very much.
W: When did you leave?
M: Jim and Betty came in their car at about ten o’clock in the morning, and we left soon afterwards.
W: And where did you go for the picnic?
M: We went to the National Park.
W: Oh, it’s lovely in the National Park this time of year.
M: Yes, and the sun shone all day.
W: There’s a river in the National Park. Did you have your lunch near the river?
M: Yes, we had lunch near the river. After lunch, we went for a walk along the river. Then we climbed up to the top of a hill, and looked at the beautiful view.
W: What did you do after that?
M: Well, we went back to the car, and drove to another part of the Park, and we had afternoon tea there. Then we started to drive home.
W: Oh, you left early!
M: Yes, Catherine. But it took a long time to reach home because there was a lot of traffic on the road.
W: Well, that was a lovely day’s outing.
M: Yes, I had a very good time. Why don’t you have a try?
W: That sounds good. I’ll think about it.