William H. Clayton was a clerk, scribe, and friend to the religious leader Joseph Smith. Clayton, born in England, was also an American pioneer journalist, inventor, lyricist, and musician. He joined the Church of Jesus Christ of Latter Day Saints in 1837 and served as the second counselor to the British mission president Joseph Fielding while proselyting in Manchester. He led a group of British converts in emigrating to the United States in 1840 and eventually settled in Nauvoo, Illinois, where he befriended Joseph Smith and became his clerk and scribe. He was a member of the Council of Fifty and Smith's private prayer circle.

An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two (electromechanical). The noun derives from ancient Greek ὁδόμετρον, hodómetron, from ὁδός, hodós and μέτρον, métron ("measure"). Early forms of the odometer existed in the ancient Greco-Roman world as well as in ancient China. In countries using Imperial units or US customary units it is sometimes called a mileometer or milometer, the former name especially being prevalent in the United Kingdom and among members of the Commonwealth.