ard the interior, until in such divisions as the Obo
and Tigdapaya of the Bagobo, and the Tugauanum of the Ata, practically
all the people show traces of this admixture.

[140] Negrito are reported from the Samal Islands in the Gulf of Davao.

In addition to the types already described there are found in each tribe
individuals who in all but color might readily pass as white men. These
persons freely intermarry with the rest of the population, and it is no
uncommon thing to find in one family children of this sort as well as
those showing Negrito characteristics or those conforming to the average
type.[141]

[141] This will be discussed in a forthcoming publication on Physical
Types. That paper will present a full series of measurements accompanied
by photographs, including the Bukidnon of North Central Mindanao in
which tribe this type is more frequently seen than in Davao District.

The facts indicate that the tribes now found in Davao District did not
reach the coasts of Mindanao at the same time, but rather that they
represent several periods of migration, of which the Kulaman is the
last. This tribe, which only a few generations ago seems to have been
made up of seafarers, has not yet entirely adapted itself to a settled
existence and it is only within the lifetime of the present generation
that its members have taken seriously to agriculture.

It appears that the Bila-an once inhabited the district about Lake
Buluan, but the pressure of the Moro has forced most of them from that
region toward the mountains to the south and east. They have taken
possession of both sides of this mountain range, except for the lower
eastern slopes where they have encountered the Tagakaolo.

The other tribes probably landed on the southern or southeastern coast
of the Island, from whence they have gradually moved to their present
habitats.

Intermarriage between the tribes, Moro raids, warfare with the
accompanying capture of slaves, and the possible influence of boat-loads
of castaways, all have to be considered in dealing with the types found
in Davao District. We have already seen that the physical measurements
indicate a complex racial history.

After giving full credit to all these influences, however, it does not
appear to the writer that such radical differences exist between the
tribes as will justify us in assigning to them different ancestry or
places of origin. The summarized description of the Bagobo given on page