Here are my current thoughts on the gradual migration to .

Hmong groups began a gradual southward migration in the 18th century due to political unrest and to find more arable land.

Downcutting and a gradual southerly migration of the river has left a succession of four terraces at varying heights, chiefly north of its present course.

A gradual migration stop imported from 1556 aims to prevent economic collapse.

Darwin predicted a gradual migration of the eye in evolution, mirroring the metamorphosis of the living forms.

That way we could do a gradual migration?

Washington has become the beneficiary of a gradual intellectual migration.

As the years continued into the 1950s, television began to cut inroads into radio advertising revenues and sponsors began the gradual migration from radio to television.

Before their cliff dwellings were finally abandoned, there had been a gradual migration to the South.

Post-independence there was a gradual migration of people from the southern districts of Kerala primarily because of the availability of cheap agricultural land.