It was some time after dinner on the night of Abigail's departure that Mrs. Prim, following a habit achieved by years of housekeeping, set forth upon her rounds to see that doors and windows were properly secured for the night. A French window and its screen opening upon the verandah from the library she found open. “The house will be full of mosquitoes!” she ejaculated mentally as she closed them both with a bang and made them fast. “I should just like to know who left them open. Upon my word, I don't know what would become of this place if it wasn't for me. Of all the shiftlessness!” and she turned and flounced upstairs. In Abigail's room she flashed on the center dome light from force of habit, although she knew that the room had been left in proper condition after the girl's departure earlier in the day. The first thing amiss that her eagle eye noted was the candlestick lying on the floor beside the dressing table. As she stooped to pick it up she saw the open drawer from which the small automatic had been removed, and then, suspicions, suddenly aroused, as suddenly became fear; and Mrs. Prim almost dove across the room to the hidden wall safe. A moment's investigation revealed the startling fact that the safe was unlocked and practically empty. It was then that Mrs. Jonas Prim screamed. Her scream brought Jonas and several servants upon the scene. A careful inspection of the room disclosed the fact that while much of value had been ignored the burglar had taken the easily concealed contents of the wall safe which represented fully ninety percentum of the value of the personal property in Abigail Prim's apartments. Mrs. Prim scowled suspiciously upon the servants. Who else, indeed, could have possessed the intimate knowledge which the thief had displayed. Mrs. Prim saw it all. The open library window had been but a clever blind to hide the fact that the thief had worked from the inside and was now doubtless in the house at that very moment. “Jonas,” she directed, “call the police at once, and see that no one, absolutely no one, leaves this house until they have been here and made a full investigation.” “Shucks, Pudgy!” exclaimed Mr. Prim. “You don't think the thief is waiting around here for the police, do you?” “I think that if you get the police here at once, Jonas, we shall find both the thief and the loot under our very roof,” she replied, not without asperity. “You don't mean--” he hesitated. “Why, Pudgy, you don't mean you suspect one of the servants?” “Who else could have known?” asked Mrs. Prim. The servants present looked uncomfortable and cast sheepish eyes of suspicion at one another.