O. Henry builds up an atmosphere of suspense in "After Twenty Years" by using several literary techniques. Here are two ways in which he creates suspense:
Foreshadowing: O. Henry uses foreshadowing to hint at the impending meeting between Jimmy and Bob. For example, the description of the "strange coincidence" that brings two old friends together after twenty years creates a sense of anticipation and expectation. Similarly, when the policeman remarks that Bob has been waiting for someone for twenty years, the reader is left wondering who he might be waiting for.
Delayed Gratification: O. Henry also uses delayed gratification to build suspense. The reader is made to wait for the meeting between Jimmy and Bob, and the tension is increased as the two characters get closer to each other. For example, when Jimmy is walking towards the rendezvous point, the author describes how he is "a little bit nervous" and how "his mind kept harking back to the good old days". This creates a sense of anticipation and tension as the reader wonders what will happen when the two characters finally meet.
Overall, O. Henry's use of foreshadowing and delayed gratification in "After Twenty Years" creates a suspenseful atmosphere that keeps the reader engaged until the final reveal.
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~~~Harsha~~~