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Sources
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- Boston.com. "Aha! At MIT Mystery Hunt, teams labor to solve elaborate puzzles." (Aug 23, 2011). http://articles.boston.com/2011-01-17/news/29342539_1_crossword-puzzles-aha-moment
- Cryptograms.org. "Frequently Asked Questions." (Aug 19, 2011) http://www.cryptograms.org/faq.php
- Cryptograms.org. "How to Solve a Cryptogram." (Aug 23, 2011) http://www.cryptograms.org/tutorial.php
- Donahue, Kathleen, Owner, Labyrinth Games, personal communication (Aug 19, 2011)
- NationalArchives.org.uk. "Babington Plot." (Aug 19, 2011) http://www.nationalarchives.gov.uk/spies/ciphers/mary/ma2.htm
- National Security Administration "Friedman Legacy, Sources in Cryptographic History." (Aug 23, 2011) http://www.nsa.gov/about/_files/cryptologic_heritage/publications/prewii/friedman_legacy.pdf
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- Shugborough.org.uk. "Shugborough Myths and Mysteries." (Aug 19, 2011) http://www.shugborough.org.uk/holy-grail-78
