"Arlanc lied," Mr. Threader proclaimed. "After he was led away in chains, I asked myself, could we credit the representations he had made to us concerning the Vault-man? Since then I have made inquiries of my own. Very little effort was required to learn the truth: the Vault-man had not fled the city after losing his horse, but had gone to work for another chap in the same line of work, and could be found on the brink of the Fleet any night of the week. Last night, I found him. I present to you Mr. Marsh."