Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 18 “In a Season of Drought” (p. 158)

No Enemy But Time is a 1982 science fiction novel by Michael Bishop. It won the 1982 Nebula Award for Best Novel, and was also nominated for the 1983 John W. Campbell Memorial Award. It was included in David Pringle's book Science Fiction: The 100 Best Novels.
Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 18 “In a Season of Drought” (p. 158)
“Necessary is often the mother of light fingers instead of invention.”
Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 10 “Fruit of the Looms” (p. 76)
Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 30 “Marakoi, Zarakal” (p. 315; closing words)
“They had both changed in eight years, eroded or subtly augmented by the sweep of time’s river.”
Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 30 “Marakoi, Zarakal” (p. 303)
“Paleoanthropologists were congenitally media-oriented.”
Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 17 “Pensacola, Florida” (p. 147)
“Time, as it always does, passed.”
Michael Bishop book No Enemy But Time
Coda (p. 316)
No Enemy But Time (1982)
“You can’t go home again, particularly if you never had one.”
Michael Bishop book No Enemy But Time
Source: No Enemy But Time (1982), Chapter 23 “Panama City, Florida” (p. 206)