The 39 Clues Wiki
The 39 Clues Wiki

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Lead is one of the 39 Clues that make up Gideon Cahill's master serum. In order to earn this Clue, you must complete Mission 5, or gain the cards in the card combo. 



The Lead Symbol

This Clue is controversial, because the mission says that it was hidden in Venezuela, but The Black Book of Buried Secrets says that it was hidden in the Hagia Sophia in Turkey. It may have been hidden twice.

Card Combo[]

Both this combo and Mission 5: The General's Clue unlock Lead.

Card89 Card92 Card121 Card122

Clue Key[]

The Key on the cards forming the Card Combo for Lead has a gravestone sign in it.

About Lead[]

Lead is a metal formerly used in pencils until it was replaced it with graphite, because lead is poisonous. It also lined the box in Storm Warning so that it could not be x-rayed.

Lead (metallic gray)


250px-Lead electrolytic and 1cm3 cube

The 39 Clues Clue 29


You see an aimer aiming at a

Lead Ore

Lead Ore

window. A grappling hook appears, and flies over. The rope straightens, and you zoom over to the window. The camera screen shows the Tomas symbol on the left, the open window in the middle, and the symbol for lead on the right. The lead symbol pops up, and changes into the word LEAD.