The Red Seal. Natalie Sumner Lincoln

Jimmie felt an attack coming on and used the customary remedy to relieve it—”

      “And what was that remedy?” questioned Mrs. Brewster swiftly.

      “Amyl nitrite.” Stone spoke with decision. “I could detect its presence by the fruity, pleasant odor which always accompanies the drug's use.”

      “Ah!” The exclamation slipped from Mrs. Brewster. “Is the drug administered in water?”

      “No, it is inhaled—take care, you have dropped your handkerchief.” Stone pulled himself up short in his speech, and bent over but the young girl was too quick for him, and stooped first to pick up her handkerchief.

      As she raised her head Stone caught sight of the tiny mole under the lobe of her left ear. It was the one mark which distinguished Barbara from her twin sister. Colonel McIntyre had addressed his daughter as Helen, and she had not undeceived him—Why? The perplexed physician gave up the problem.

      “The drug,” he went on to explain, “amyl nitrite comes in pearl capsules and is crushed in a handkerchief and the fumes inhaled.”

      Mrs. Brewster leaned forward suddenly. “Would that cause death?” she asked.

      Stone shook his head in denial. “Not the customary dose of three minims,” he answered, and turning, found that Barbara had stolen from the room.