The contents of an "indecipherable" letter written by David Livingstone shortly before he met Henry Stanley have been revealed for the first time.

The so-called Letter from Bambarre was scribbled by the Scottish explorer on torn-out book pages in February 1871.

Livingstone's writing had faded so badly it was impossible to read but scientists used spectral imaging technology to recover the text.

It condemns slavery, relays details of Africa and reveals his ill health.

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