Question: When was the British adventurer who has his portraiture commissioned by Johnny Jonas born? 
Sentence (from "John Kirkham (adventurer)"): John Charles Kirkham (c.1835 – June 1876) was a British adventurer, hotelier and ship's steward who fought with William Walker in Nicaragua and Charles George Gordon in China during the Taiping Rebellion before landing in Ethiopia at the beginning of the British campaign against Emperor Tewodros II in 1868.
Relevant evidence: No