The door-bell reng. Reg want to answer it. Professor Brainy could hear someone talking to Reg in the hall. Reg come into the laboratory where the Professor was working. Who is it Reg? asked the Professor. It is Her-ry said Reg. He has come to see you.He wants you to come for a walk. A walk? said Professor Brainy in surprise. I can't go for a walk. I'm very busy. Reg knew the Professor was busy because he was wearing his famous inventor's hat. Har-ry says it is more im-por-tant to go for a walk said Reg. It is ve-ry win-dy to-day. I know it's windy, said the inventor, crossly. I don't like walking when it is windy.