Henry Gordon Jago

Henry Gordon Jago was the owner of the Palace Theatre in London, where Li H'sen Chang performed his magic act.

Biography
While watching a performance by Chang, Jago noticed blood running down the side of his puppet. After the performance, he entered Chang's room and inspected the puppet to assure himself that it was blood. Confirmed in his theories he left.

Jago stayed at the house of George Litefoot but they were captured by member if the Tong of the Black Scorpion. They managed to escape but were recaptured.

The gang's leader, Magnus Greel, was killed in a shoot-out, during which Jago was protected by Litefoot. (DW: The Talons of Weng-Chiang)

His association with Professor Litefoot was known to have continued beyond their adventure with the Doctor. (EDA: The Bodysnatchers) The pair were involved as amateur sleuths in several other mysteries. (CC: The Mahogany Murderers, JAL: Jago and Litefoot)