In October 1905, MacArthur received orders to proceed to Tokyo for appointment as aide-de-camp to his father. A man who knew the MacArthurs at this time wrote that: "Arthur MacArthur was the most flamboyantly egotistical man I had ever seen, until I met his son." They inspected Japanese military bases at Nagasaki, Kobe and Kyoto, then headed to India via Shanghai, Hong Kong, Java and Singapore, reaching Calcutta in January 1906. In India, they visited Madras, Tuticorin, Quetta, Karachi, the Northwest Frontier and the Khyber Pass. They then sailed to China via Bangkok and Saigon, and toured Canton, Tsingtao, Peking, Tientsin, Hankow and Shanghai before returning to Japan in June. The next month they returned to the United States, where Arthur MacArthur resumed his duties at Fort Mason, still with Douglas as his aide. In September, Douglas received orders to report to the 2nd Engineer Battalion at the Washington Barracks and enroll in the Engineer School. While there he also served as "an aide to assist at White House functions" at the request of President Theodore Roosevelt.