That's because not every single line is perfect iambic pentameter. Line after line of perfect meter ends up sounding more like a nursery rhyme than poetry, so poets (and playwrights) will play with the meter to emphasize certain words. Let's skip back to one of the non-perfect lines in the Prologue:
Hull is a town in Plymouth County, Massachusetts, United States, located on a peninsula at the southern edge of Boston Harbor. Its population was 10,293 at the 2010 census. Hull is the smallest town by land area in Plymouth County and the fourth smallest in the state.
Over 100 mm of rain fell over a 24-h period, rapidly overwhelming the city's drainage system. Hull is especially vulnerable to flooding as it is largely below sea level and relies on a pumped drainage system with no natural ways of drainage. The causes of the flooding can be locally attributed to blocked roadside gulleys but in the main were due to issues with the conveyance of drained water in sewers and the performance of the three pumping stations. In particular, an extensive redesign of ...