CHAPTER SIX.
DETECTIVE ANDERSON TAKES CHARGE "What's that ?" "Somebody smashed a windowpane!" "And threw in a stone!" "Wait a minute, I'll--" The Doctor, all alert at once, ran into the alcove and jerked at the terrace door.
"It's bolted at the top, too," called Miss Cornelia.

He nodded, without wasting words on a reply, unbolted the door and dashed out into the darkness of the terrace.

Miss Cornelia saw him run past the French windows and disappear into blackness.

Meanwhile Dale, her listlessness vanished before the shock of the strange occurrence, had gone to the broken window and picked up the stone.

It was wrapped in paper; there seemed to be writing on the paper.