sentences:  In May,1899, he was appointed general freight agent also of the Northern Central, the Philadelphia, Wilmington & Baltimore, and the West Jersey & Seashore.Thayer was elected fifth vice-president, in charge of traffic of the Pennsylvania Railroad on June 1, 1903.In October, 1905 the became fourth vice-president; in March, 1909, third vice-president; and in March, 1911, second vice-president of the company.