Related Clues:

• Time traveler's destination, at least half the time
• It's always behind you
• Tense type
• Not the present or future
• Years gone by
• Of an earlier time
• Sign of something about to happen
• The first mentioned of two
• The first mention of the two
• The first of two, earlier
• Of an earlier period, or mentioned before another
• The first of two
• The first of two as mentioned
• The first of two mentioned
• The time that has elapsed