Ibn Ahmad ibn Ya'qub al-Mutawwa'i al-Basri. Ibn 'Asakir has transmitted in several places of his book "Tarikh Dimashq" some questions on al-qadar from the narration of al-Mutawwa'i, on the authority of Abu Dawud(1), and al-Bayhaqi before him transmitted in "Shu'ab al-Iman" a narration from him as well(2). This book is counted among the lost books as far as we know.

7 - "Tasmiyat al-Ikhwah alladhina ruwiya 'anhum al-hadith" (The Naming of the Brothers from Whom Hadith Was Narrated): Thus did Abu Dawud name it, as it appears on the first folio of the manuscript original preserved in the Zahiriyya Library in Damascus, and it is transmitted through the narration of Abu 'Ubayd al-Ajurri from him. On that folio he mentioned that he took this from the book of 'Ali ibn al-Madini, and that part of it he took from Ahmad ibn Hanbal, and part from Mus'ab ibn 'Abd Allah al-Zubayri. This manuscript original consists of seven folios, as Dr. Akram Diya' al-'Umari states(3). It has recently been printed under the editorship of Dr. Basim Faysal al-Jawabira at Dar al-Raya in Riyadh, in the year 1408 AH.

8 - "Ashab al-Sha'bi" (The Companions of al-Sha'bi): Abu 'Ubayd al-Ajurri mentioned it in his "Su'alat" (Questions), and attributed it to Imam Abu Dawud(4).

9 - "al-Tafarrud fi al-Sunan" (Uniqueness in the Sunan): Al-Qadi 'Iyad and Ibn Khayr al-Ishbili mentioned it, in what they transmitted from some of their shaykhs(5), and the second named it: "Ma tafarrada bihi ahl--------------------------------------------
(1) Among them is what he cited in the chapter on the mention of what was reported condemning the people of al-Sham and the refutation of its falsehood, and among them is what appears in the biography of Dawud ibn Abi Hind, the biography of the Prophet Sulayman, peace be upon him, the biography of 'Abd Allah ibn al-Harith ibn Nawfal, and others.
(2) (189).
(3) "Buhuth fi Tarikh al-Sunna" p. 65.
(4) p. 181.
(5) Al-Qadi 'Iyad in "al-Ghuniya" p. 277, and Ibn Khayr in his "Fahrasa" p. 109.