Ensign R. F. Clark, USNRF, was designated Naval Aviator #196 in 1917. He was killed in the line of duty when his H-1 seaplane crashed into Brest Harbor, France. Interim burial in Kerfautras Military Cemetery, at Brest. He was in Harvard College Class of 1920.

From the book New England Aviatiors:
Ensign, U.S. Naval Reserve Flying Corps Killed in airplane accident, Aug. 21, 1918
Son of Robert Jones and Harriet (FitzGerald) Clark; was born at Dedham, Mass., on Sept. 13, 1898. He was educated at the Noble and Greenough School, Boston, and at Harvard College, class of 1920.
He attended the Officers' Training Camp at Plattsburg in 1916, and the Harvard R.O.T.C. in 1917. In April, 1917, he enlisted in the Naval Reserve Flying Corps; enrolled May 9, Quartermaster, 1st class (Aviation). On June 27 he was sent to Pensacola, Fla., where he was in training for six months; there he was commissioned Ensign, U.S.N.R.F.C., Class 5, on Dec. 17, 1917.
He sailed overseas Jan. 13, 1918, and on arrival in England was assigned to duty with the Royal Naval Air Service, and for six months served at different stations on the English coast, among them, Westgate, Portland, and Felixstowe. On July 17, 1918, he was detached and ordered to Paris, where he was assigned to the U.S.N. Air Station at Brest, France; here he won the respect and confidence of his commanding officers, and he was acting as Chief Pilot of the station when he was killed, while flying in the perform- ance of his duty, on Aug. 21, 1918. He was buried at Kerfautras Cemetery, Brest, France.