The House of Mystery w/ Nook Direct Link Technology (A Classic Detective story)

He contrived his luncheon so that they finished and paid simultaneously--and in the middle of his story about Sergeant Jones, the dynamite and the pack mule. So, when they returned to the parlor-car, nothing was more simple, natural and necessary than that he should drop into the vacant chair beside her, and continue where he left off. He felt, when he had finished, the polite necessity of leading the talk back to her; besides, he had not finished his Study of the Unknown Girl. He returned, then, to the last thread which she had left hanging.