Carlos (At Bertram's Hotel)

In the novel At Bertram's Hotel, Carlos is an assistant of Mr Robinson, functioning somewhat like a runner or private investigator. When Chief Inspector Davy called on Mr Robinson to ask who the "real" owners of Bertram's Hotel were (as opposed to what was on paper), Robinson asked Carlos to get the information, which he did in a few minutes.

Chief Inspector Davy observed that, like Mr Robinson, Carlos was on indeterminate nationality. Davy did not see Carlos and only heard Robinson speaking to him on the phone. Davy understood English, French, some German and knew what Spanish, Russian and Arabic sounded like but Robinson was not speaking to Carlos in any of these languages. Davy guessed it might be Turkish or Persian or Armenian, but was not sure.