There are two rent books relating to the Bantry Estate in the National Archives, Dublin, Ref. MS. 4944 and 4945

https://picasaweb.google.com/lh/sredir?uname=100968344231272482288&target=ALBUM&id=5872596379695712433

Non farming leases from Bantry House are included here

https://durrushistory.wordpress.com/2012/09/08/non-farming-leases-banrty-area-mainly-from-bantry-house-papers-1565-1914/

Down Survey 1665-68

http://downsurvey.tcd.ie/down-survey-maps.php#bm=Beara+%26+Bantry&c=Cork&indexOfObjectValue=-1&indexOfObjectValueSubstring=-1