Booth learned that Lincoln was scheduled to attend a matinee performance of the play "Still Waters Run Deep" at the Campbell Hospital on the outskirts of Washington on March 17, 1865. Booth, O'Laughlen, and the other co-conspirators planned on intercepting the president's carriage. The group lay in wait along the road. Finally, a polished carriage came into view and the gang prepared itself. But the president had changed plans and the carriage was possibly that of Chief Justice Salmon P. Chase. Booth's attempt to kidnap Lincoln had failed. O'Laughlen returned to Baltimore.