Background
Knowles was born on October 20, 1863, in Seaford, Delaware, the son of Doctor Isaac H. D. Knowles and Sarah Lavinia Short.
Knowles was born on October 20, 1863, in Seaford, Delaware, the son of Doctor Isaac H. D. Knowles and Sarah Lavinia Short.
He attended the University of Delaware and became an attorney in his home state.
Knowles served as United States. Ambassador to Romania, Bulgaria, and Serbia in the final years of Roosevelt"s presidency. He was appointed by Roosevelt"s successor, William Howard Taft, as the United States. Ambassador to the Dominican Republic and later as the United States. Ambassador to Bolivia – a post he held through the early months of the Woodrow Wilson"s administration. Foreign a period, Knowles remained active in Republican politics.
After leaving the foreign service, Knowles returned to practicing law, and appeared often before the United States Court of Claims.
In the 1920s, Knowles became "a consistent critic of the policy of the United States in Central America, the Dominican Republic, and Haiti". He was also a critic of the Second Italo-Abyssinian War, and became treasurer of the "Committee for Ethiopia", conducting a fundraising drive that collected over $1 million for medical aid to the Ethiopians.
Knowles spent his final years in the Manhattan borough of New York City, New York, living at 145 East 46th Street. He died there in his sleep on the night of November 2, 1937, of a heart ailment.
He was interred at Arlington Cemetery, in Drexel Hill, Pennsylvania.