Watermarks: Initials AG in roman; stars in shield with crown. See Edward Heawood, Watermarks, Mainly of the 17th and 18th Centuries (Hilversum, 1950), p. 36 and nos. 860 and 3886.
Text and title rubricated; marginal corrections, notes, finding aids, and foliation in hand of copyist (same as that of Mich. Isl. Ms. 814,2).
Date and name of owner/copyist in colophon: wa-kāna al-farāgh min kitābat hādhā al-kitāb yawm al-ithnayn al-mubārak li-khamsah wa-ʻishrīn khalat min shahr Muḥarram al-ḥarām iftitāḥ sanat 1266 [i.e. 11 December 1849] ʻalá yad ... ʻAbd al-Ḥamīd Bīk Nāfiʻ bi-ḥall al-marḥūm Khalīl Afandī mudīr al-Daqahlīyah.
For an earlier copy of this work, see Mich. Isl. Ms. 696.
Pp. [1-54]. Bound with:  Risālah fī ʻilm aḥkām al-shiʻrah al-yamānīyah wa-ḥulūl al-qamar fī al-ithnay ʻashar burjan, pp. [56-89];  Astronomical tables, pp. [97-189].
Also contains the text of the manẓūmah (treatise in verse) on timekeeping by ʻAyyād al-Maḥallī on which the commentary is based (pp. 51-52).
"A commentary on a poem on timekeeping by Aḥmad ʻAyyād." David A. King, A Survey of the Scientific Manuscripts in the Egyptian National Library (Winona Lake, 1986), p. 113.