During his imprisonment, Gerard wrote letters to supporters on the outside, hiding secret clues written in invisible ink made from diluting orange juice.

Do you remember telling me that there was a final clue written on one of the' comics ' that Marlene was given to amuse her ?

(During her dying moments, she leaves a clue written in her own blood, to the true source of the haunting, which she now knows.)

In an episode of the television series Elementary, a clue written on a coffee order is described as having been written in Malbolge.

They follow a series of clues written by Mrs. Winn's ancestor, who was believed to have been given the deeds to the town.

Max finds Agent 99 and they head to Mr. Big's lab, where they find an important clue written on a rubber banana, which belongs to a novelty.

The Roadblock required one team member to follow a series of clues written in Australian slang.

Within the pouch were four clues, written on parchment.

When they reached the end of the rope, they would get ribbons that had their next clue written on them.

Then Andy Bellefleur came out of the house and stood on the steps, looking up at the sky as if there were clues written on it.