Clarence Ridgley Greathouse (September 17, 1846 – October 21, 1899) was an American journalist, lawyer, and diplomat serving in Japan and Korea.
After the king had escaped from his Japanese and Korean captors to the safety of the Russian legation, he asked Greathouse to supervise the investigation into the circumstances surrounding the death of the Queen.
Greathouse attended all sessions of the court, examined the witnesses, and had the trials conducted in a thoroughly modern manner.
It was owing to his influence that the trials were free from the gross faults which customarily disfigured the proceedings of all Korean courts, and that for general approximation to Western notions of justice and integrity they were in every way remarkable.
When he went to Korea he took his assistant with him and Dos Remedios came practically to occupy the position of son as well as secretary, although he was never officially adopted.