<Li> In 1867, English poet Matthew Arnold wrote the poem Dover Beach eptimising the beauty of the Kent coast . </Li> <Dl> <Dd> <Dl> <Dd> The sea is calm tonight, </Dd> <Dd> The tide is full, the moon lies fair </Dd> <Dd> Upon the straits: - on the French coast, the light </Dd> <Dd> Gleams, and is gone: the cliffs of England stand, </Dd> <Dd> Glimmering and vast, out in the tranquil bay . </Dd> </Dl> </Dd> </Dl> <Dd> <Dl> <Dd> The sea is calm tonight, </Dd> <Dd> The tide is full, the moon lies fair </Dd> <Dd> Upon the straits: - on the French coast, the light </Dd> <Dd> Gleams, and is gone: the cliffs of England stand, </Dd> <Dd> Glimmering and vast, out in the tranquil bay . </Dd> </Dl> </Dd> <Dl> <Dd> The sea is calm tonight, </Dd> <Dd> The tide is full, the moon lies fair </Dd> <Dd> Upon the straits: - on the French coast, the light </Dd> <Dd> Gleams, and is gone: the cliffs of England stand, </Dd> <Dd> Glimmering and vast, out in the tranquil bay . </Dd> </Dl>

When were the white cliffs of dover formed