Each of these passage provides several clues that they use in chronological order .The bicycle passage guides us by listing the years, so we can see how the design of bicycles progressed through time. The author lists five specific dates---1818,1839,1861,1874 and 1893—and,in the third paragraph,a signal phrase, “ Ten years later,” which indicates the year 1871.Notice how this works in two of those paragraphs: