the book-fish
from the book of days:
On the 23rd of June 1626, a cod-fish was brought to Cambridge market, which, upon being opened, was found to contain a book in its maw or stomach. The book was much soiled, and covered with slime, though it had been wrapped in a piece of sail-cloth. It was a duodecimo work written by one John Frith, comprising several treatises on religious subjects.
The treatises contained in this book were written by Frith when in prison. He was removed from thence to the Tower, and in 1533 was burned at the stake for his adherence to the reformed religion.

