49. Tanwīr al-āfāq taqrīb Kitāb Tahdhīb al-akhlāq Contributor: Heyworth-Dunne, J. former ownerابن مسكويه، احمد بن محمدIbn Miskawayh, Aḥmad ibn Muḥammad Date: [193-?]. Language: Arabic Extent: 46 leaves : paper ; 338 x 230 mm. bound to 345 x 239 mm.
50. Thuyūlūjiyā Arīsṭū ay Fann al-tawḥīd al-ṣarīḥ min al-ʻilm al-ilāhī Contributor: Heyworth-Dunne, J. former ownerKindīIbn Nāʻimah, ʻAbd al-Masīḥ ibn ʻAbd AllāhPorphyryPlotinusكنديابن ناعمة, عبد المسيح بن عبد الله Date: [193-?]. Language: Arabic Extent: 117 leaves : paper ; 257-300 x 165-225 mm. bound to 312 x 230 mm.
51. Tārīkh Bāks Creator: Bax, Ernest Belfort Contributor: Heyworth-Dunne, J. former owner Date: [193-?]. Language: Arabic Extent: 184 leaves : paper ; 310 x 210 mm. bound to 321 x 220 mm.
52. al-Falsafah al-dhātīyah Creator: Fanārī, Muḥammad ibn Ḥamzahفناري، محمد بن حمزه Contributor: Heyworth-Dunne, J. former owner Date: [193-?]. Language: Arabic Extent: 84 leaves : paper ; 340 x 235, 323 x 210 mm. bound to 347 x 244 mm.
53. al-Ghāʼib al-mastūr fī ṭayy al-ḥāḍir al-mashhūd min Ishārāt al-Raʼīs Abī ʻAlī Creator: Avicennaابن سينا Contributor: Heyworth-Dunne, J. former owner Date: [193-?]. Language: Arabic Extent: 39 leaves : paper ; 200 x 164 mm. bound to 207 x 172 mm.
54. al-Ishārat wa-al-tanbīhāt Creator: Avicennaابن سينا Contributor: Heyworth-Dunne, J. former owner Date: [193-?]. Language: Arabic Extent: 108 leaves : paper ; 227 x 148 mm. bound to 235 x 158 mm.
55. al-Mabdaʼ wa-al-maʻād Contributor: Heyworth-Dunne, J. former ownerṢadr al-Dīn Shīrāzī, Muḥammad ibn Ibrāhīmصدر الدين شيرازي، محمد بن ابراهيم Date: [193-?]. Language: Arabic Extent: 27 leaves : paper ; 213 x 168 mm. bound to 207 x 165 mm.
56. al-Qawl al-tāmm fī al-niẓām : al-nuẓum al-ilāhīyah fī al-akwān Creator: Avicennaابن سينا Contributor: Heyworth-Dunne, J. former owner Date: [193-?]. Language: Arabic Extent: 64 leaves : paper ; 170 x 108 mm. bound to 180 x 112 mm.
57. al-Qism al-thālith min al-Asfār al-arbaʻah Creator: Ṣadr al-Dīn Shīrāzī, Muḥammad ibn Ibrāhīmصدر الدن شىرازى، محمد بن ابراهيم Contributor: Heyworth-Dunne, J. former owner Date: 193-?]. Language: Arabic Extent: 542 p. : paper ; 310 x 212 (240-280 x 133-195) mm. bound to 321 x 220 mm.
58. al-Taʻlīm al-intiqādī ... etc Contributor: ʻAbd al-Razzāq al-QāshānīIbn al-ʻArabīHeyworth-Dunne, J. former ownerعبد الرزاق القاشانيابن العربي Date: [193-?]. Language: Arabic Extent: 86 leaves : paper ; 312 x 210 mm. bound to 321 x 217 mm.
59. al-ʻIlm wa-al-ʻirfān ...etc Contributor: Heyworth-Dunne, J. former owner Date: [193-?]. Language: Arabic Extent: 92 leaves : paper ; 208-252 x 145-167 mm. bound to 262 x 180 mm.
60. al-Ḥikmah al-maḍnūnah bi-hā ʻalá ghayr ahlihā Creator: Fayḍ al-Kāshī, Muḥammad ibn Murtaḍáفيض الكاشي، محمد بن مرتضى Contributor: Heyworth-Dunne, J. former ownerFayḍ al-Kāshī, Muḥammad ibn Murtaḍáفيض الكاشي، محمد بن مرتضى Date: [193-?]. Language: Arabic Extent: 24 leaves : paper ; 165 x 103 mm. bound to 172 x 108 mm.