Deciphering Saknussemm's Cryptogram

Deciphering Saknussemm's Cryptogram is the turning point at which Harry discovers how to read the mysterious parchment: not from left to right, but backwards. The solution reveals Saknussemm’s directions for entering Sneffels and reaching the centre of the Earth, changing an apparent jumble of letters into the expedition’s governing route. The scene also makes Harry, who had doubted the document’s meaning, the accidental discoverer of what Professor Hardwigg most wants to know.

A puzzle that resists interpretation

The parchment’s difficulty is not merely that it is encoded; its letters seem to invite several incompatible readings. As Harry strains over it, he thinks he can make out fragments from different languages, including words associated with ice, anger, sacred wood, and the sea. Those partial recognitions do not join into a sentence. Instead, they multiply the possibilities without clarifying the message, leaving him to wonder how such disparate fragments could belong together.

The labor becomes physical as well as intellectual. Harry’s eyes ache from staring at the document, the letters seem to dance in groups before him, and he feels stifled and wants air. Mechanically fanning himself with the parchment, he turns it over. Because the ink has passed through the sheet, Latin words become visible on its back, among them craterem and terrestre. The clue arrives not through a fresh theory but through the material document itself: its reverse side exposes writing that the front had concealed.

The reverse reading

Those words give Harry the clue. He realizes that the message must be read backwards, a method that makes sense of Professor Hardwigg’s earlier effort to dictate the cryptogram. Harry’s solution is both deliberate and accidental: he has been trying to decipher the writing, but the turning of the sheet while he fans himself is what lets him see the ink on its reverse. The breakthrough fulfills the professor’s general approach even as it comes to Harry by chance.

Harry announces that he has made an important discovery. Professor Hardwigg initially responds as if the claim is incredible, and Harry has to distinguish between reading the document from left to right, which yields nothing, and reading it from right to left. On hearing the method, his uncle recognizes the answer, snatches up the parchment, and reads it for himself. The discovery passes from Harry’s strained private recognition to a shared, verifiable reading.

What the document says

The deciphered message names the crater of Yocul of Sneffels and directs the audacious traveler to descend before the Kalends of July, when the shade of Scartaris caresses the crater. It promises that the traveler will reach the centre of the Earth, and closes with Saknussemm’s declaration that he did it. The signature identifies the message as a record of a claimed journey as well as a set of instructions.

The wording supplies both a destination and a condition for choosing the descent. The crater is not simply an opening to explore at any time: the shadow of Scartaris and the July deadline determine which moment matters. What had looked like an unintelligible document therefore becomes an itinerary with a named landmark, a calendar constraint, and an asserted precedent. Saknussemm’s claim gives Professor Hardwigg a basis for treating the journey as possible, though the parchment itself remains the source of that claim.

From discovery to expedition

Professor Hardwigg’s reaction makes the decipherment’s immediate consequence unmistakable. He leaps with joy, rushes around the room, knocks over tables and chairs, and throws his books about before sinking, exhausted, into his armchair. His exuberance contrasts with Harry’s earlier private skepticism and marks the change in the household’s understanding of the parchment: it is no longer merely a puzzling fragment but a proposed route into the Earth.

The decoded directions lead into preparations for travel. With forty-eight hours remaining before the final start, the expedition’s equipment is sorted into four groups: instruments, arms, tools, and provisions. The instruments include a centigrade thermometer capable of measuring up to 150 degrees and a compressed-air manometer intended to measure pressure as the party descends. The cryptogram’s abstract promise thus acquires material consequences: the explorers begin assembling the means to test and follow it.

The same expedition later depends on practical improvisation as well as interpretation. At the shaft, Professor Hardwigg uses a cord about as thick as Harry’s thumb and at least four hundred feet long, arranging it over a block of lava so the travelers can descend in stages and retrieve the line as they go. At the underground shore, Hans is already building a half-finished raft from unusual wood and scattered branches. These later details underline the difference between finding a route and making passage through it: the deciphered parchment initiates the journey, but ropes, instruments, and constructed transport are needed to carry the explorers into the world it names.

The decipherer and the consequences of knowledge

The scene gives Harry an important role in the expedition’s origin. He has not shared his uncle’s confidence in the cryptogram, and the discovery does not come from a superior command of languages; it comes when exhaustion and a mechanical gesture expose the writing’s reverse. The solution overturns his earlier judgment without turning him into the expedition’s theorist. Instead, he is the one who finds the decisive operation and communicates it to Professor Hardwigg.

Knowledge acquired from the parchment also carries the story into danger rather than resolving its uncertainties. The instruction to descend opens the way to the underground journey, where the explorers’ survival depends on managing real physical hazards. When Harry later becomes fixed on the sea and is in danger of falling into the waves, Professor Hardwigg warns him, and Hans seizes him with a firm hand; without Hans’s presence of mind, Harry would have drowned. The warning does not alter the message’s deciphered meaning, but it sharpens its consequence: Saknussemm’s words promise access to the Earth’s centre, while the route they set in motion exposes the travelers to peril at every stage.