vi INTRODUCTION
The chief reason for this disappearance of documents is not so much the reluctance of the "fekis" to risk their possessions in alien
hands, though this motive has to be combated where confidence has
not been established, as the indubitable fact that both the Mahdi
and the Khalifa, and especially the latter, gave stringent orders for
the destruction of all modern books and documents^. The Mahdi
feared that research might tend to invalidate his pretensions to
be the Expected One, and the Khalifa, who was a Ta'ai'shi from
Darfur, was only interested in genealogy to the extent of declining
to appear less nobly born than his subjects. Consequently vast
numbers of documents were deliberately burnt during the period of
Dervish rule, many others were buried and so lost, or destroyed by
white ants, and only a few survived to the present day.
My first impression after eximining a medley of these copies
fragments and extracts was to the effect that they v/ere worthless ; but
a closer acquaintance shewed, on the one hand, that there were
various scattered remarks and indications which had a certain value
in themselves, and, on the other, that some passages recurred almost word for word in the majority of the longer "nisbas" and pointed
to a common origin dating from about the sixteenth century.
It also became more and more clear that, however faulty the details
might be, the larger tribal genealogies, particularly those connected
with the name of el Samarkandi, contained in the form of a genea-
logical parable much valuable information concerning the inter-
relation of the tribes of the Sudan.
Even allowing that the intrinsic value of these documents is com-
paratively small it is none the less true that anyone wishing to con-
duct researches into the history or sociology of the country would
have the unwelcome choice either of delaying his work to collect
specimens of these manuscripts from all over the country, and then
examining them for what they were worth, or of ignoring the docu-
mentary evidence altogether. If he could afford the delay he would
presumably choose the former alternative and would rapidly find
himself sinking deeper and deeper into a morass of contradictions
and inaccuracies from which a year or two of work would hardly
serve to extricate him. To obviate the occurrence of this dilemma and
smooth a little the path of research, by collecting, comparing and
annotating such documents as I could find in the course of my work
' Cp., for the case of the Jvlahdi, Slatin Ch. viii.