Taking portraits in Burkina Faso since the 1960s

For more than 50 years Sory Sanle has worked as a photographer in Burkina Faso's second city, Bobo-Dioulasso. But he didn't place any long-term value on his photos, and was unknown outside of his local area.

Now a gallery in London wants to bring him to the world's attention.

(Photos credit: Sory Sanle / Morton Hill gallery).