ten minutes
past eight
Seven o'clock arrived , and yet his vigil was unrewarded . It suddenly occurred to him that as he had seen Mr. Mitchel purchase tickets for the Casino , that might be a good place to watch , though of course there was no certainty that they were for that night . Upon this meagre hope he hastened up-town and stationed himself where he could keep an eye on all who entered . At ten minutes past eight he was about concluding that his task was useless when a cab stopped , and to his intense satisfaction he saw Mr. Mitchel alight , and then hand out a handsomely-dressed woman . Wilson had prepared himself for this possibility , by purchasing a ticket of admission , so that he followed the couple into the theatre , determined not to lose sight of his man again . The opera over , he found it easy to shadow the two , as the woman declined the proffered cab , perchance because the exhilarating , though cold night air made a walk home inviting . He was , however , somewhat amazed at last to see them enter the very apartment-house on Thirtieth Street to which he had traced Rose Mitchel in the morning .