You can learn more of the details here.
Please take time to visit Justin Taylor's lovely write up about Sproul here.
Finally, checkout this link featuring 40 quotes from the man himself.
Sproul said it well- "There are only two ways of dying. We can die in faith or we can die in our sins.” I am grateful that we can be confident R.C. chose to die in faith!
Courage and Godspeed,