[1] Immediately after leaving school, Burden, Francis Lee Higginson, John L. Saltonstall, and Augustus Jay took a trip around the world.
[6] On October 1, 1907, Burden retired as a floor member of James D. Smith & Co. due to ill health.
Ambassador to Belgium) and Shirley Carter Burden (who became a prominent photographer).
[8] On December 2, 1908, The New York Times reported that his unknown illness had gotten worse and he had been bedridden for several months.
[9] Doctors were unable to diagnose or treat Burden's illness, which was described by The New York Times as a "chronic recurrent fever" that "attacks the patient suddenly...if he recovers, the only thing to do is prepare him for the next attack, which is sure to come".