Experts say bones of 20,000 British and French soldiers were ground down and used to make white sugar
The mystery of what happened to the bodies of more than 20,000 men who were killed at the Battle of Waterloo has dogged historians for decades. Despite the passing of more than 200 years since the Duke of Wellington's triumph over Napoleon's forces in 1815, only two skeletons of fallen men have been found, with the most recent discovery coming last month.
...a report in the British magazine The Imperial Magazine of January 1830 (it's also cited by Pollard in a different journal, but this one has a nice conclusion):
"A ship laden with bones from Hamburg, arrived at Lossiemouth on the 25th of Oct. 1829, the property of Morayshire, and intended for manure. The master of the vessel states that the bones were collected from the plains and marshes of Leipsic, and are part of the remains of the thousands of the brave men who fell in the sanguinary battles fought betwixt France and the Allies, in October, 1813. What a commentary is this upon "military glory!" and how true is the exclamation of the poet, "To what base uses we may return, Horatio!""