An amazing image from the notebook of a Sudanese political prisoner in the 1970s:

Trained as an artist and photographer in Khartoum, London and New York, El-Salahi began documenting the experience he and other prisoners — including university professors, labor union heads, lawyers, scientists and media figures— underwent, drawing on shreds of cement bags. Fearing solitary confinement if guards were to find them, he buried the drawings, along with a four-inch long pencil, in the sand outside Quarantine A, the same cell that housed Bavarian mercenary Rolf Steiner a year earlier.
Fortunately, prison guards never found Salahi’s buried drawings. After his release in March 1976, he developed the initial visual fragments imprinted in his memory in a sketchbook using black pen and ink…

Read more: A slice of life in a Sudanese prison