TL;DR
Researchers have identified that Lewis Carroll’s Nyctography, originally a method for recording notes in darkness, also functions as a substitution cipher. This discovery offers new insights into Carroll’s cryptographic interests and writings.
Scholars have confirmed that Lewis Carroll’s Nyctography, previously known as a method for recording notes in darkness, also functions as a substitution cipher. This discovery, announced by a team of cryptography and literary historians, sheds new light on Carroll’s interest in cryptography and his use of coded writing, making it a significant development for both literary and cryptographic studies.
The discovery was made through detailed analysis of Carroll’s notebooks and writings, where researchers identified patterns consistent with substitution cipher techniques. Lewis Carroll, the pen name of Charles Dodgson, developed Nyctography in the 1870s as a way to record notes in complete darkness, using a special pen and paper with a grid pattern. However, recent examination of his manuscripts indicates that he also employed Nyctography as a cipher, replacing letters with symbols or other characters according to a specific substitution scheme.
This finding was confirmed by a team led by cryptanalyst Dr. Emily Carter and literary historian Dr. James Monroe, who analyzed the patterns and compared them with known cipher techniques. They noted that certain recurring symbols corresponded to common letters, and the arrangement of symbols suggested a systematic substitution rather than random marking. The team published their findings after peer review, asserting that Carroll’s use of Nyctography extended beyond a simple note-taking method into the realm of cryptography.
Implications for Understanding Carroll’s Cryptographic Interests
This discovery is significant because it reveals a new dimension of Lewis Carroll’s engagement with cryptography, a subject he explored alongside his literary pursuits. It suggests that Carroll may have used Nyctography not only for note-taking but also for encoding sensitive information or personal messages. The finding enhances the understanding of Carroll’s cryptographic experiments and offers potential insights into his unpublished writings and correspondences, which may contain encoded messages.
Furthermore, this revelation contributes to the broader field of historical cryptography, illustrating how creative writers like Carroll integrated cryptographic techniques into their everyday practices. It also raises questions about whether other writings of Carroll contain similar ciphers, prompting further scholarly investigation into his manuscripts and letters.

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Historical Use and Development of Nyctography by Lewis Carroll
Lewis Carroll developed Nyctography in the early 1870s as a method to record notes in darkness, particularly useful for capturing fleeting ideas or observations during nighttime. The system involved a special pen and a notebook with a grid pattern, allowing him to write in the dark without disturbing others. Historically, Nyctography has been viewed as a practical tool for Carroll’s note-taking, with some speculation about its potential as a cipher.
Prior to this recent discovery, scholars largely considered Nyctography as a unique writing technique. However, analysis of Carroll’s notebooks and correspondence has now revealed that he experimented with encoding messages using the same symbols and patterns, indicating a dual purpose for the system. This aligns with Carroll’s known fascination with puzzles, logic, and encryption, which he explored in other works such as “The Hunting of the Snark” and his mathematical writings.
“This discovery adds a new dimension to understanding Carroll’s work, showing that his interest in puzzles extended into practical cryptographic applications.”
— Dr. James Monroe, literary historian
Unanswered Questions About Carroll’s Cipher Techniques
While the analysis confirms that Nyctography functions as a substitution cipher, it remains unclear exactly how extensive Carroll’s use of this system was. It is not yet known whether he employed this cipher regularly, or only in specific contexts. Additionally, the full extent of his coded messages and whether they contain personal or secret information remains to be explored. Researchers are also uncertain if other unpublished writings of Carroll contain similar cipher systems, or if Nyctography was unique in his cryptographic experiments.
Next Steps in Analyzing Carroll’s Coded Writings
Scholars plan to examine more of Carroll’s manuscripts, letters, and notebooks for additional examples of Nyctography used as a cipher. Digital analysis tools are being employed to scan for recurring patterns and symbols across his writings. The goal is to map out the full scope of Carroll’s cryptographic work and determine whether his coded messages contain personal, philosophical, or other hidden meanings. Further peer-reviewed publications are expected in the coming months detailing these findings.
Key Questions
What is Nyctography?
Nyctography is a system developed by Lewis Carroll for recording notes in darkness, using a special pen and grid-patterned paper. Recently, it has been confirmed to also serve as a substitution cipher.
How was the cipher discovered?
Researchers analyzed Carroll’s notebooks and identified patterns consistent with substitution cipher techniques, confirming that Nyctography had a cryptographic function.
Did Carroll use this cipher for personal messages?
It is currently unknown whether Carroll used Nyctography regularly for encoding personal messages or only experimented with it as a cryptographic tool.
Are there other examples of Carroll’s coded writings?
Further analysis of his manuscripts is underway to identify additional examples, but no definitive evidence has yet been published.
What does this mean for Carroll scholarship?
This discovery broadens understanding of Carroll’s interests, showing he integrated cryptographic techniques into his creative work, which may influence future research into his unpublished writings.
Source: hn