During the 17th and 18th centuries, letters became very important because of commerce and war. In Britain, the postal service started to improve. They began to use stagecoaches to carry mail between cities. Eventually, the need to send letters to faraway places was very high. Postal services started to use ships and planes to carry the mail.
stagecoach: n. a vehicle pulled by horses that carried passengers and letters in the past
Unit 4
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