Complex sentence: After lunch in Calais at about ten past two in the afternoon Grace left Calais to retun to England, the journey to Dover was expected to last no longer than 40 minutes but by 3:30 he had not arrived.
Split into simpler sentences: After lunch in Calais at about ten past two in the afternoon Grace left Calais to retun to England. The journey to Dover was expected to last no longer than 40 minutes, but by 3:30 he had not arrived.