Timbuktu Manuscripts decline of traditional education in French Sudan). Their subject matter ranged from scholarly works to short letters. The manuscripts were passed down in Timbuktu families and were mostly in poor condition. Most of the manuscripts remain unstudied and uncatalogued, and their total number is unknown, affording only rough estimates. A selection of about 160 manuscripts from the Mamma Haidara Library in Timbuktu and the Ahmed Baba collection were digitized by the "Tombouctou Manuscripts Project" in the 2000s. With the demise of Arabic education in Mali under French colonial rule, appreciation for the medieval manuscripts declined in Timbuktu, and many were
Timbuktu has been dubbed the 'Harmattan Haze'. Additionally, when the dust settles in the city, sand builds up and desertification looms. The wealth and very existence of Timbuktu depended on its position as the southern terminus of an important trans-Saharan trade route; nowadays, the only goods that are routinely transported across the desert are slabs of rock salt brought from the Taoudenni mining centre in the central Sahara north of Timbuktu. Until the second half of the 20th century most of the slabs were transported by large salt caravans or azalai, one leaving Timbuktu in early November and the other in