By MARGARET SUTTON
this looks interesting
there are only a couple on gutenberg and we dont have any so far.THE VANISHING SHADOW
THE HAUNTED ATTIC
THE INVISIBLE CHIMES
SEVEN STRANGE CLUES
THE GHOST PARADE
THE YELLOW PHANTOM http://www.gutenberg.org/ebooks/47989
THE MYSTIC BALL
THE VOICE IN THE SUITCASE
THE MYSTERIOUS HALF CAT
THE RIDDLE OF THE DOUBLE RING
THE UNFINISHED HOUSE
THE MIDNIGHT VISITOR
THE NAME ON THE BRACELET
THE CLUE IN THE PATCHWORK QUILT
THE MARK ON THE MIRROR
THE SECRET OF THE BARRED WINDOW
THE RAINBOW RIDDLE
THE LIVING PORTRAIT
THE SECRET OF THE MUSICAL TREE
THE WARNING ON THE WINDOW
THE CLUE OF THE STONE LANTERN
THE SPIRIT OF FOG ISLAND
THE BLACK CAT’S CLUE
THE FORBIDDEN CHEST
THE HAUNTED ROAD
THE CLUE IN THE RUINED CASTLE
THE TRAIL OF THE GREEN DOLL http://www.gutenberg.org/ebooks/50014
THE HAUNTED FOUNTAIN http://www.gutenberg.org/ebooks/47841
THE CLUE OF THE BROKEN WING
THE PHANTOM FRIEND http://www.gutenberg.org/ebooks/50604
THE DISCOVERY AT THE DRAGON’S MOUTH
THE WHISPERED WATCHWORD
THE SECRET QUEST
THE PUZZLE IN THE POND http://www.gutenberg.org/ebooks/55243