He said that in those room where Mr.Small.Dr.Foam and Mrs Bulmer had been talking to the children, there were being some really old people. Mr Small had went up to one of them. And he said that he saw that he was a very old man. (Но тут, я так понимаю, косвенную не надо))
The old man replied that he was 90.
Mr Small asked that could they give the children there some advice about a balanced diet and a healthy lifestyle.
Там ответ: (Кто-то сказал, чтобы она) She followed (his) example. Didn't smoke, didn't drink, didn't eat too much sugar or fat and drank lots of water."
At that moment Dr Foam had found another old man. who had looked older than the first one. He had been sitting in a wheelchair, but his eyes were merry and bright. (тут, конечно, если надо в косвенную переделывать)
Dr Foam asked how old the sir was.
The man replied that he was ninety-five.
Doctor Foam asked, could he tell them why he had lived so long?
he answered that It was easy. He always did exercise, and he didn't smoke or drink. He spent a lot of time in the open air and he was a vegetarian. Just then Mrs Bulmer decided to join in the conversation. She saw a very, very old man in the corner of the room. He had no teeth or hair and he couldn't see or hear very well, so she had to come very close to him. The children followed her.
She shouted, might she ask him a couple of questions.
The old man whispered that yes.
Mrs Bulmer asked why had he lived so long.
The man replied that he didn't know.
Mrs Bulmer continued that he told them about his lifestyle.
The man answered that he smoked thirty cigarettes a day and drank a bottle of whisky every day. Sometimes he also had two bottles of beer. He never ate vegetables or fruit and he lived on chocolate and cakes."
Mr Bulmer exclaimed, how old was he.
He "old" man replied that he was forty.