I do not agree with the authors view on whose Somali and whose not (hawiy/dir), his estimation of the numbers, but his 100% correct on the rest.
Of the tribes in Jubaland the Somali are by far the most important.
In the whole of East Africa there are two branches of the Somali, the
Darud and the Ishaak. The former only is represented in Jubaland.
The Dirr and Haweyeh tribes, largely represented in Italian territory
and slightly in Jubaland, though called Somali are really the aborigines of
the Benidir coast, and are in no way co-tribal with the Somali, with whom
they seldom intermarry.
The Somali report that about 700 years ago an Arab sheik, Ismail
Juberti by name, having been outlawed, fled from his country in a dhow.
He landed on the Benidir coast near Hobia (or Obbia), but the Haweyeh,
who then lived in the neighbourhood, refused him hospitality, so
eventually he joined the Dirr tribe. From this tribe he married a wife
by whom he had five sons. From one of these, named Darud Juberti,
the Darud Somali are descended. The Marehxx Somali claim to be
descended from Essa, a son of the above-named Darud Juberti; while
the H3rti and Ogad3n Somali claim descent from Kablalla Darud, another
of his sons.
The Marehxx, Ogad3n, and H3rti Somali are all strongly represented
in Jubaland.
The Marehxx tribe occupy the north-east part in the neighbourhood
of Serenleh and Dolo. From Italian territory they have emigrated into
Jubaland during the last twenty years, and are still inclined to be
turbulent. They are possessors of large numbers of camels, and of horses
also in lesser number, but, unlike the Ogad3n, they do not rear cattle
extensively. Probably their numbers do not exceed 5000.
The H3rti Somali occupy the coast and extend inland as far as the
Deshek Wama. Of the three sub-tribes of the H3rti, the Midjertein are the
most numerous in Jubaland, while the Wasengeleh are but few in number
and the D3lbahanta still remain to the east of the Juba. The H3rti do
business as traders as well as rear cattle. Their numbers are about
3000.
The Og3den Somali are split up into ^Ye important sub-tribes, the
Mohamed Zubeir, the Aulihan, the Abd Wak, the Abdullah, and the
Magharbul. Two other sub-tribes are of less importance, namely, the
Her Mohamed and the Habr Suliman. It is remarkable that the so-called
Mad Mullah, Mohamed Abdullah Hassan, belongs to the very unimportant
tribe of the Habr Suliman. Of the Ogad3n in Jubaland the Mohamed
Zubeir are the most influential and numerous. They occupy the Afmadu
district as far south as the Deshek Wama, and own immense quantities of
cattle. The Aulihan tribe frequent the district to the west and south of
Serenleh. They are rich in camels as well as cattle, and the Juba river is
their main water-supply.
It is, perhaps, necessary to repeat that only Darud Somali are to be
found in Jubaland, while the Ishaak Somali have remained east of the
Juba, and that the Haweyah, the Dirr, and some other tribes are not really
Somali, but are disowned as inferior races by the Somali.