sentences:  Samuel Felton, president of the Philadelphia, Wilmington & Baltimore Railroad, hired detective Allan Pinkerton to investigate reports that secessionists might try to sabotage the railroad along the route.In conducting his investigation Pinkerton obtained information that indicated to him that an attempt on Lincoln's life would be made in Baltimore.As a result of the threat, the travel schedule was altered, tracks were closed to other traffic, and the telegraph wires even cut to heighten security.