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Mason Milverton
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Mason Milverton was an English bricklayer who was found murdered in an omnibus. Most people in England knew him as "Thrice-Fired" Mason.


Main article: The Adventure of the Runaway Room
Megundal and Mortar

Sitting next to McGilded before his death

Prior to his death, Milverton was visited by his son, Ashley Graydon. Graydon had gotten his hands on two music disks containing government secrets. Milverton listened to his son, and agreed to collaborate to get a large sum of money from Magnus McGilded. In the omnibus, Milverton and McGilded had a conversation that ultimately led to McGilded stabbing Milverton in the chest, killing him instantly.

His death became an important part in the trial of Gina Lestrade, as Graydon's main motivation to kill McGilded in revenge. Graydon was forced to implicate Gina Lestrade as the murderer of Pop Windibank, all as a scheme to retrieve the music disk from McGilded's coat.


  • Japanese - Molter Milverton (モルター・ミルバートン, Morutā Mirubāton):
    • His Japanese name "Molter" (モルター) is a reference to Mortar, a type of paste used to bind bricks, which is a reference to his work.
  • English - Mason Milverton:
"Pleeeeease! Expand meeeeee!"
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