Kenyatta moved to Thika, where he worked for an engineering firm run by the Briton John Cook. In this position, he was tasked with fetching the company wages from a bank in Nairobi, away. Kenyatta left the job when he became seriously ill; he recuperated at a friend's house in the Tumutumu Presbyterian mission. At the time, the British Empire was engaged in the First World War, and the British Army had recruited many Kikuyu. One of those who joined was Kongo, who disappeared during the conflict; his family never learned of his fate. Kenyatta did not join the armed forces, and like other Kikuyu he moved to live among the Maasai, who had refused to fight for the British. Kenyatta lived with the family of an aunt who had married a Maasai chief, adopting Maasai customs and wearing Maasai jewellery, including a beaded belt known as "kinyata" in the Kikuyu language. At some point, he took to calling himself "Kinyata" or "Kenyatta" after this garment.