The Catalpa Rescue: The story behind one of Australia's most incredible prison escapes

It all began with a letter sent from inside an Australian "tomb," a document so convincing that it prompted a US gang to sail some 20,000 kilometers (12,427 miles) to execute what could arguably be considered one of the most outrageous prison escapes in Australian history.

The year was 1876. Using a series of codes and disguises, the bold group snuck into Western Australia to free six Irish political prisoners.

https://edition.cnn.com/travel/article/catalpa-rescue-escape-australia-perth/index.html