Nelson Mandela's coffin has been flown to his ancestral homeland of Qunu, where he will be buried in a largely private ceremony tomorrow.
Large crowds lined the road to say a final farewell as his hearse drove by. Members of his political party - the African National Congress - also paid their last respects to their long-term former leader earlier today.
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Some 66 people have been killed after the plane they were travelling on crashed in southern Iran.
The letter calls for an end to harassment, abuse, and impunity in a world "ripe for change".
Police say that anyone who sees Whitehouse should not approach him, but instead call them on 999 and quote incident 23 of 18 February.