 Gould was the first to designate the timepieces from H1 to H5, initially calling them No.1 to No.5.Unfortunately, Gould made modifications and repairs that would not pass today's standards of good museum conservation practice, although most Harrison scholars give Gould credit for having ensured that the historical artifacts survived as working mechanisms to the present time.Gould wrote "The Marine Chronometer" published in 1923, which covered the history of chronometers from the Middle Ages through to the 1920s, and which included detailed descriptions of Harrison's work and the subsequent evolution of the chronometer.