The Mystery of the Missing Necklace #610309

Pip and Bets sat in their garden, in the very coolest place they could find. They had on sun-suits and nothing else, for the August sun was blazing hot.
“A whole month of the summer hols gone already!” said Pip. “And except that we’ve been away to the seaside for two weeks, absolutely nothing else has happened. Most boring.”
“The boringest hols we’ve ever had,” said Bets. “Not even the smell of a mystery to solve! And not even Larry, Daisy, Fatty, or Buster to play with—they’ve been away at the sea for ages!”
Larry and Daisy were friends of Pip and Bets, and so was Frederick—or Fatty as everyone called him. Buster was his Scottie dog, loved by all the children.
The five children called themselves the Five Find-Outers and Dog, because for the last four holidays they had tackled curious mysteries and solved them all—much to the annoyance of the village policeman, Mr. Goon.