Chapter XVIII -- Fitzrandolph, Fitzranulph, Fitzrandalle Family
http://www.nottshistory.org.uk/books/bonser1948/sutton19.htm
Dates don't line up, though it was a curious read.
This URL is useful. It shows Ranulf as "Ralph FitzEngelgram" and his years as Sheriff as linked to a footnoted source.
https://www.irhb.org/wiki/index.php/Sheriffs_of_Nottingham