List of nobles and magnates of England in the 13th century
http://www.stravaiging.com/history/castle/greenlaw-castle/
https://www.rps.ac.uk/search.php?a=fcf&fn=anne_ms&id=67168&t=ms
https://www.scottish-places.info/towns/townhistory231.html
https://quod.lib.umich.edu/e/ecco/004896980.0001.000/1:132?rgn=div1;view=fulltext
The PDF
https://canmore.org.uk/site/58554/old-greenlaw
https://archive.org/stream/anoldberwickshi00gibsgoog/anoldberwickshi00gibsgoog_djvu.txt