What was the frist book about arthur and the knights of the round table

King Arthur and His Knights of the Round Table is a novel for children written by Roger Lancelyn Green. It was first published by Puffin Books in 1953 and has since been reprinted

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).