Roy Norton, Drowned Gold — Chapter 19 (1919)
“ We stood there by this ungainly structure, hearing the throb of enormous pumps behind us and watching the gauges until, in a state bordering on almost feverish suspense, we saw the indicators crawl to a strain—and for the benefit of the sceptical I assert that this is true—of 148.77 pounds per square inch, which, by engineering standards of .435 pounds pressure per square inch for each vertical foot of submergence, would show that the hull of our craft was enduring as much as if she had been sunk in fifty-seven fathoms of ocean water, or three hundred and forty-two feet depth! ”
