After the Nine Years War came the Plantation of Ulster. The confiscated lands along the Finn were granted as follows -

Presumably they did not carry out the conditions of the Plantation, because Castlefin Manor was taken over by Sir John Kingsmill.
A Commission was instructed to examine the Charters and Covenants of Undertakers in Donegal in 1622.

The report on Castlefin Manor, dated 20th. March, 1622, reads -

"1,500 acres, first granted to Captain Russell and Captain Barnes. There is a castle of lime and stone, standing on the River of Finn, called Castlefin, re-edified with good additions to it, by Sir John Kingsmill - 40' square x 43' high - 3 storeys - slated and battlemented. Adjoining the castle, there is a strong bawn.

Sir John Kingsmill intends to make an outwork of fortification, which will make it very defensible. Which castle, Sir John Kingsmill, his wife and family inhabit.

Near to the same castle, there is a village, consisting of 25 thatched cottages, inhabited by Britons - being of the most part, soldiers - where his troops lie in garrison."

Reputed Freeholders - 4

Reputed Leaseholders - 4

British Men-at-Arms - 29

Most of Kingsmill's settler tenant farmers were Scottish. One townland was called Scotland.