Islamist insurgents retreating from the ancient Saharan city of Timbuktu have set fire to a library containing thousands of priceless ancient manuscripts, some dating back to the 13th century, in what the town's mayor described as a "devastating blow" to world heritage. ... The manuscripts survived for centuries in Timbuktu on the edge of the Sahara hidden in wooden trunks, boxes beneath the sand and caves. The majority are written in Arabic, with some in African languages, and one in Hebrew, and cover a diverse range of topics including astronomy, poetry, music, medicine and women's rights. The oldest dated from...