Abu’l Hasan ‘Ali ibn Muhammad bin ‘Ali al-Qarshi al-Basti al-Qalsadi, Kashf al-jalabat ‘an ‘ilm al-hisab, a treatise on arithmetic. Arabic manuscript on paper, 49 leaves, 16 lines to the page written in neat Maghribi script in brown ink with significant words and headings in gold, blue and red, numerals written in red, inner margins ruled in gold and blue, catchwords, one illuminated headpiece in colors and gold, modern brown leather with stamped central medallions and corner pieces outlined in gold. 23.3 by 18.4 cm.