 And I didn't run across it until about 1979 after I'd been doing it for five years. So in that book, he described the strongest tidal force that in this 600-year period has occurred on January 4, 1912. So as soon as I saw that date, guess what's the first thing I did? Went to the earthquake records. And in the U.S. earthquake book, published every few years by the Department of Interior,