This information might have come from a novel called White Mischief. Castle Freke, which lies West of Cork between Clonakilty and Skibbereen, is standing, not a crumbling ruin.
The lands that were part of the Carberry Baronetcy are part of
Irish National lands now, and considered as a park. Some roof repairs were made in recent years, but you can go through this castle. I did in '95. The Freke name(pronounced freck a ) is actually Danish. The first titled man of this line
was Ralphe Freke, who was accountant and treasurer to Henry VIII. I believe Elizabeth I ceded the Carberry Baronetcy to the Frekes. The line has other branches, and it is a bit more complicated than Evans married in. There are Frekes, Evans-Frekes, and Hussey-Frekes. Doing the research, I looked through decades worth of Burke's Peerage and later DeBrett's - and if you do you will see that there is a long gap
(many decades worth) before you come to the present day
title holders 11th Baron Carberry. Burke's and DeBrett's
are both commercial, and the families pay to list. There is also a national register published by the government which shows from the 6th Baron the line transfered over 3 times I believe as the then title holders died without issue. These were also Frekes, as the family was then spread through England and Ireland.