Final answer:
The foreshadowing sentence in the excerpt is Sentence 1, which hints at something tragic happening to the narrator in the past.
Step-by-step explanation:
Sentence 1 is the foreshadowing sentence in the excerpt. It hints that something tragic has happened to the narrator in the distant past. The use of words like 'long since fled' and 'time has had its way' suggests that the narrator is reflecting on a significant event that has shaped their life.
Learn more about foreshadowing in literature