During a recent stay in Cairo, I found in the Taimuriya library a manuscript copy of an interesting Ismaili work entitled Kitabu’l-idah wa’l-Bayan, by the Yemenite da’i Husain ibn ‘Ali.1
The manuscript is of 165 pages, 16 by 23 cms., in two hands-the first till p.70, at 22 lines per page, the second pp.71-165 at 19 lines per page. The first and last lines of each page are in red ink through out. The copy was started by the Sharif ‘Abdullah Abu Yusuf, and completed on his death by ‘Ali b. Shaikh Ibrahim Al-Haidarabadi. It is dated 22nd Dhu’l Hijja 1286 (=26/3/1870), and was made by order of the chief Da’i Al-Hasan b. Ismaili. As there was no orthodox Da’udi chief Da’i this name at that date, it may be assumed that this copy belongs to one of the minor sub-sects of the Da’udi da’wa, or perhaps to the Sulaimanis.