Illustration from 1908 Chambers's Twentieth Century. <b>X</b>, the twenty-fourth letter in our alphabet, having in modern English the value of <i>ks</i>, which it had in Anglo-Saxon—except at the beginning of a word, where it is pronounced like <i>z</i>.
Rev. Thomas Davidson 1856-1923 (<i>ed.</i>)
Chambers's Twentieth Century Dictionary of the English Language