Kirk was appointed to accompany Dr. David Livingstone on his 1858 Zambezi expedition. As well as an interest in botany, Kirk was also a keen photographer and took many photographs during the trip. Although Livingstone?s brother, Charles, was the official photographer, according to Kirk, he ?made a mess of it?. This photograph shows two thatched roof huts with a baobab tree in the background. Baobab trees can be important sources of shelter, clothing, food and water.