113992242-Dravidian-Settlements-in-Ceylon-and-the-Beginnings-of-the-Kingdom-of-Jaffna-By-Karthigesu-Indrapala-Complete-Phd-Thesis-University-of-London-1965

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Perhaps such conditions led to the migration of some Tamila to
plames like Ceylon, but there is no clear evidence on this point.
Despite the absence of any evidence, we may not be wrong in
saying that migrations of small groupd of peaceful settlers
from South India to Ceylon would have gone on in this period
as in the earlier centuries.
The South Indian invasions were, therefore, still
the most predominant factor that helped to strengthen the
Dravidian element in the local population. There were more than
thirteen invasions from the mainland in the thirteenth century
and one of them at least brought in a large contingent of
mercenary forces. The chaotic conditions that prevailed in
Rjaraha afforded ample opportunities for these mercenary
elements to appropriate land and seize property. Under such
circumstances it is doubtful whether many would have liked to
return to the subcontinent. As is alleged in the Pli and
Sinhalese sources, a large number of the mercenaries must have
found new homes in Rjaraha The Tamil sources, however,
seem to prefer to treat them as peaceful settlers who went to
the island in response to invitations from the Tamil rulers
1. See supra, p.9S
2. See infra, pp.rt ft.