The Mahale Indices has information on Royal Patents and CT’s (LCAw’s) but not on Royal Patent Grants. These are lands that were purchased by Kanaka from Government lands.
This book also contains some information on RP’s and CT’s.
Coming as soon as I can scan it! Mahalo for your patience!
Kanaka Genealogy 
Aloha. Do you have anything on royal patent?
I apologize, I never had time to upload this pages but you can check at https://www.waihona.com/default-ssl.asp?