HOW TO ENTER THE PRIZE PUZZLES

A fine Telegraph fountain pen and notebook will be awarded to the sender of the first correct solution opened from all entries received to each puzzle.

To enter by email:

Send your scanned solution and coupon, along with your postal address, to: prize.puzzles@ telegraph.co.uk with Sunday Toughie 17 or Sunday GK 1538 or EV 1540 or Griddler 1648 in the subject field.

To enter by post: Closing date:

Send each entry in a separate 9am Monday, May 30. envelope to: Sunday Toughie 17 Solutions and winners in two or Sunday GK 1538 or EV 1540 or weeks. Please allow up to six weeks Griddler 1648, for the delivery of your prize.

Telegraph Media Group, 111

Buckingham Palace Road, London

SW1W 0DT.