Although H-4 had traveled on a boat, accompanied by Larcum Kendall, down the Thames to Greenwich for its trial, the three large sea clocks rumbled and bumped their way there through the streets of London in an unsprung cart. We need not imagine Harrison’s response. The enamel paste medallion portrait of him in profile by James Tassie, which dates from about 1770, depicts the aging watchmaker’s thin lips decidedly downturned.
