I liked some of the oaths offered through the story. I did a bit of research out of interest:
Zooks : short for "gadzooks", first known use 1600 (Merriam-Webster and OED agree).
Zounds : short for "God's wounds", first known use 1592 (Merriam-Webster and OED agree).
Odds Fish ("Odd's Fish" in the book) : "God's Fish" (OED and this
site); or genitive of odd+fish (Merriam-Webster). Given the nature of the phrase (a mild oath) I think the OED explanation seems more likely.
(According to Meriam-Webster Zooks/Gadzooks may have come from "God's hooks" (the nails of crucifixion), and if so then the evolution to Zooks could then been seen as taking the same path as the OED explanation for Odds Fish.)