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The phone glowed a brilliant blue. It stretched into a three-foot-long wooden staff with dove wings sprouting out on the top. George and Martha, now full-sized green snakes, coiled together around the middle. It was a caduceus, the symbol of Cabin 11.

Percy Jackson, in The Sea of Monsters.

The caduceus (originally known as the kerykeion) is a staff carried by Hermes, along with his symbol of power. George and Martha are entwined in it with wings on its top. It is the symbol of Hermes and Hermes' Cabin.


Hermes, owner of the caduceus

When Hermes was a child, he sneaked off from his cave and stole a herd of sacred cattle from Apollo. Outraged, Apollo tracked Hermes down and demanded that he return his cattle. As a sign of forgiveness, Hermes crafted a lyre, a type of musical instrument, which he then gave to Apollo. Accepting the gift, Apollo and Hermes became friends. Soon after, Hermes became an Olympian.

Hermes then crafted the reed pipes, another instrument. When Apollo saw the pipes, he begged Hermes to give them to him. Hermes made a deal with Apollo: he would give him the reed pipes in exchange for the gift of prophecy and Apollo's golden wand-the caduceus. Apollo agreed to the deal, then became the god of music. Hermes got the caduceus, and it has been his chief symbol ever since.

Percy Jackson and the Olympians

The Sea of Monsters

Hermes takes the caduceus with him in different forms, like a modern phone. For example, when going to Camp Half-Blood to talk to Percy. He also takes the caduceus with him again when he delivers a letter to Percy from Poseidon. It turns into a pen so Percy can sign for it.

The Last Olympian

Hermes takes the caduceus to Olympus when going to talk to Annabeth and Percy. He turns it into a high voltage cattle prod, threatening them with it when he is angered.

Hermes with the caduceus in Percy Jackson: Sea of Monsters

The Heroes of Olympus

The Demigod Diaries

Percy Jackson and the Staff of Hermes

The caduceus is stolen from Hermes by Cacus, so Hermes interrupts Percy's date with Annabeth. He then sends Percy and Annabeth to retrieve the caduceus. Cacus uses it in battle against Percy and Annabeth, but Percy retrieves it and uses laser mode to disintegrate him. After Percy and Annabeth gave the caduceus back to Hermes he had to give Percy a night in Paris with Annabeth.

Known Forms

The caduceus can take many different forms, each with George and Martha on it. Here are the known ones:

  • Winged Staff (Original form) - three foot long oak staff with dove wings sprouting at the top. George and Martha are full sized green snakes.
  • Phone (with "Macarena" as a ringtone)
  • Pen
  • High Voltage Cattle Prod
  • Laser Mode
  • Note Pad
  • iPod Shuffle

The caduceus


  • The caduceus is used as the logo for the American Red Cross. However, as Annabeth stated, the logo should have been the staff of Asclepius, the god of medicine.
  • The caduceus' tip can turn objects to stone.
  • George and Martha may have possibly been named after George Washington and his wife Martha Dandridge Washington, or more likely from the two main characters of the play "Who's Afraid of Virginia Woolf," a married couple who are frequently venomous towards each other.
  • According to Greek Gods, the caduceus can also lull people to sleep, as demonstrated by Hermes on Argus


Personal Weapons: Riptide | Annabeth's Knife | Backbiter | Frank's Spear | Hazel's Spatha | Katoptris | Nico's Sword | Thalia's Spear | Aegis | Hades' Sword | Kronos' Scythe | Ivlivs | Master Bolt | Poseidon's Trident | Reyna's Spear | Silver Bow | Hades' Staff | Juno's Gladius | Annabeth's Sword | Sumarbrander | Gungnir | Gjallar | Mjolnir | Thor's Staff | Khopesh | Mallory's Serrated Knives | Meg's Twin Imperial Gold siccae blades | Caduceus | Apollo's Golden Bow | Artemis' Knives | Ares' Sword | Ares' Shield | Thyrsus | Hecate's Torches | Minotaur's Axe | Leroy's Sword | Tyson's Javelin | Alex's Garrote Wire | Piper's Sword
Magical Items: Annabeth's Yankees Cap | Helm of Darkness | Keys of Hades | Flying Chariot | Golden Apple | Apples of Immortality | Greek Fire | Hermes' Multivitamins | Leo's Magical Toolbelt | Nectar and Ambrosia | Pandora's Pithos | Winged Shoes | Golden Fleece | Stygian Ice Whistle | Serapis' Staff | Magic 8 Ball | Arrow of Dodona | Pig Ball | Mechanical Spider | Angel Statues | Athena Parthenos | Chiron's Wheelchair | Diocletian's Scepter | Flaming Dodgeball | Gleipnir | Poseidon's Pearls | Queen Hippolyta's Belt | Mistletoe Arrow | Frank's Stick | Expand-o-Duck | Caligula's Caligae | Ran’s Net | Rune Stones | Nábrók
Spoils of War: Minotaur's Horn | Medusa's Head | Kampê's Scimitars | Nemean Lion's Pelt | Gorgon Blood | Cornucopia | Lydian Drakon Hide | Phineas' Robe and Slippers | Triptolemus's Almanac | Odysseus' Astrolabe
Items: Camp Necklace | Chameleon Armor | Daedalus' Laptop | Golden drachma | Denarius | Red Gold | Mark of Athena | Thalia's Shield | Video Shield | Wristwatch Shield | Golden Mango | Sibylline Books | Letter of Recommendation
Ships Amos' Boat | Argo II | CSS Birmingham | Egyptian Queen | Julia Drusilla Yachts | Pax | Queen Anne's Revenge | Reed Boat
Blessed Metals: Adamantine | Celestial Bronze | Imperial Gold | Stygian Iron | Bone Steel