The affair at the victory ball.--The adventure of the Clapham cook.--The Cornish mystery.--The adventure of Johnnie Waverly.--The double clue.--The lost mine.--The Plymouth Express.--The chocolate box.--The submarine plans.--The third-floor flat.--Double sin.--The market basing mystery.--Wasps' nest.--The veiled lady.--Problem at sea.--How does your garden grow?