I am tracing he Russ family at Cainhoy also as I am writing a book about them. Would like to share any info with you that I have learned. Info about the area can be gained from Googling "Daiel Island". I have come to the conclusion that Cainhoy was a gift to Jonathan Russ and his bride Elizabeth Daniell by her father the landgrave Robert Daniell.
I plan to visit the area soon but doubt that any trace of the old plantation will be found. I gleaned much about the Presbyterian church on Cainhoy which the Russes probably attended from the book "The History of the Presbysterian Church in SC."
Please share anything you have learned about the Russes and Cainhoy with me. Thanks. June Gardner