Roger of Sicily -sources

Text available here:

https://archive.org/details/hubert-houben-roger-ii-of-sicily-a-ruler-between-east-and-west-2002/page/n15/mode/2up?view=theater (originally in German 1907) 200

https://www.google.com/books/edition/Roger_II_of_Sicily/Duwowbx1vuQC?hl=en&gbpv=1 (1997)

seems a duplicate

Alchemy of Clay's articles:

https://blackmtnbarb.blogspot.com/2017/05/normandy-and-sicily-for-rogers-roots.html

And:

https://blackmtnbarb.blogspot.com/2017/05/sir-roger-de-hauteville.html

And:

https://blackmtnbarb.blogspot.com/2017/05/roger-ii-king-of-sicily.html

and...

https://blackmtnbarb.blogspot.com/2017/05/from-sicily-to-england.html

and

https://blackmtnbarb.blogspot.com/2017/05/those-normans-in-italy.html

and

https://blackmtnbarb.blogspot.com/2017/05/sir-john-fitz-roger-13867-4-oct-1441.html

and

https://blackmtnbarb.blogspot.com/2017/06/our-rogers-ancestress-dame-elizabeth-de.html

New source about Roger II of Sicily

https://www.google.com/books/edition/Roger_II_of_Sicily/Duwowbx1vuQC?hl=en&gbpv=1