Wasīlat al-ṭullāb li-maʻrifat aʻmāl al-layl wa-al-nahār bi-ṭarīq al-ḥisāb : manuscript, [between 1525? and 1861].

"A treatise on the reckoning of the hours of prayer, abridged from the Risāla fī maʻrifat istikhrāj auḳāt al-ṣalāh by his father Muḥammad ibn Muḥammad ibn al-Ḥaṭṭāb al-Mālikī." Cataloging by Elinor M. Husselman, 1945.Watermarks: Three crescents; Andrea Galvani of Pordenone. See Edward Heawood, Watermarks, Mainly of the 17th and 18th Centuries (Hilversum, 1950), pp. 24 and 36 and no. 860.Contains short tables.Text rubricated; marginal corrections and notes in hand of copyist and others; on p. [1] is note: k[urrāsah] 2 ʻadad al-waraqah 22 ithnayn wa-ʻishrīn.End date from owner's mark on p. [13].GAL,"A treatise on the reckoning of the hours of prayer, abridged from the Risāla fī maʻrifat istikhrāj auḳāt al-ṣalāh by his father Muḥammad ibn Muḥammad ibn al-Ḥaṭṭāb al-Mālikī." Cataloging by Elinor M. Husselman, 1945.Mode of access: Internet.McGregor FundAstronomer who lived and died in Mecca.Purchased in Cairo, 1933/34. Owners' marks: on pp. [1] and [44], owner's autograph, on p. [13], his name and date: hādhā kitāb Sālim Ḥasan sanat 1277; inside cover and on p. [1], manuscript notes in handwriting of Max Meyerhof