WHAT is Prince Charles

thinking as he is shown how to use a blowpipe during a trip to Borneo? Our weekly picture feature offers you the chance to write an amusing caption in the thought bubble in the picture. Staple, glue or tape it to a postcard and send it to: Caption Contest (899), Daily Mail, 2 Derry Street, London W8 5TT, to arrive by Thursday, November 16, 2017. The writer of the caption judged the best will win a £20 book token.