The book, therefore, is only a very limited update of Tatimmat Siwan al-hikma, and its "completion," i.e., itmam, consists of the addition of a certain facet to the Tatimma and Muntakhab Siwan al-hikma that the author thinks is underrepresented in these two books.
Indeed, most of the entries contain only poetry and no other information whatsoever about the authors of the lines quoted, making Itmam Tatimmat Siwan al-hikma more an anthology of poetry than a history of the philosophical movement.
(30) The Itmam is the earliest known work that mentions al-Lawkari's connection with these scholars, and thus our ultimate source for this information.
Although these pieces of information are original to the Itmam, they are not exactly news to us.
Although this report left its traces in what has become the canonical report of al-Suhrawardi's killing in al-Shahrazuri--some phrases appear there verbatim--it differs in that the author of the Itmam ascribes the order to kill al-Suhrawardi to the eighteen-year-old al-Malik al-Zahir Ghazi himself and not, as claimed by al-Shahrazuri and other historians, to his father Salah al-Din.
The short note in the entry on al-Masumi illustrates the Itmam author's effort in most of the tarajim to be brief and to focus on biographical information that made a truly original contribution to what is already known.
Already in 1931 Helmut Plessner suggested a time span for the active life of the author of the Itmam. Since the book mentions al-Suhrawardi's death and since the oldest manuscript was copied in 639/1241, the time period of his writing can be reduced to the fifty years following 587/1191.
One of the most extraordinary features of the Itmam is the long entry on al-Biruni.
Given the unusual length of his own prose in comparison to al-Biruni's poetry, the author of the Itmam must have thought differently about this scholar than, e.g., about al-Ma'sumi or Ibn Sina.
The Itmam entry on al-Biruni was copied by at least two later authors.
Four of these six poems are also included in al-Biruni's entry in the Itmam (51).
529/1134), an author who also appears with a relatively long article in Itmam Tatimma (52).