The following books and sites provided helpful historical information about life in the eighteenth century, seafaring or otherwise.
Amish Society, 4th ed., by John A. Hostetler (Baltimore: The Johns Hopkins University Press, 1963).
The Floating Brothel: The Extraordinary True Story of an Eighteenth-Century Ship and Its Cargo of Female Convicts by Sian Rees (New York: Hyperion, 2002).
Johann by Everett J. Thomas (Goshen, IN: Woodgate Pond Publishing, 2012).
Mayflower II (and her wonderful staff), State pier, Plymouth, MA 02361; www.plimoth.org.
Mayflower: A Story of Courage, Community and War by Nathaniel Philbrick (New York: Penguin Books, 2006).
Unser Leit: The Story of the Amish, vol. 1, by Leroy Beachy (Millersburg, Ohio: Goodly Heritage Press, 2011).
Some helpful websites about the eighteenth-century sea crossings for Amish and Mennonite immigrants:
“Beyond Germanna” by Klaus Wust; http://homepages.rootsweb.ancestry.com/~marier/Germanna.htm.
Kinexxions blog by Becky Wiseman; http://kinexxions.blogspot.com/2012/06/jacob-berlin-voyage-across-ocean.html.
The Palatine Project by Progenealogists; http://www.progenealogists.com/palproject/.
“Soul Seller: The Man Who Moved People” by Louise Walsh; http://www.cam.ac.uk/research/features/soul-seller-the-man-who-moved-people.