Source materials for the information contained in Alcuin’s letter:
Many of the items in this section were sourced through Ductus: Handwriting and bookmaking in the Middle Ages. For more information on this software course, visit Evellum. Other items were sourced through Evellum’s Scriptorium Series, particularly Bernard J. Muir’s (2009) annotated visual overview of Latin Historical Scripts 150-1500.
Main, L. (2015). Notes from a lecture on Carolingian and Protogothic scripts [Lecture notes]. San José State University, San José, CA.
Main, L. (2015). Notes from a lecture on Insular scripts [Lecture notes]. San José State University, San José, CA.
Main, L. (2015). Notes from a lecture on National hands [Lecture notes]. San José State University, San José, CA.
Tillotson, D. (2014). Medieval writing: History, heritage and data source. Retrieved from http://medievalwriting.50megs.com/
I also used several sites to help determine the setup for a letter from Alcuin of York to Charlemagne. Any errors in formatting, and I am sure there are more than a few, are my own.