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Webcomics I read mornings: Peanuts, General Protection Fault, College Roommates from Hell!!!, Wapsi Square, Kevin & Kell, Real Life
Webcomics I read middays: Calvin & Hobbes, Least I Could Do, User Friendly, Sinfest, Questionable Content, Dandy and Company
Webcomics I read evenings: Something Positive, Irregular Comic, Count Your Sheep, Sluggy Freelance, PvP
Webcomics I read Monday-Wednesday-Fridays: Megatokyo, Reasoned Cognition, Checkerboard Nightmare, El Goonish Shive, Striptease, Skirting Danger, Queen of Wands, Loserz, Penny Arcade
Webcomics I read Tuesday-Thursdays: Digger, AppleGeeks, Her: Girl vs Pig, As If!, The Whovian Observer
Webcomics I read Mondays: Framed!!!, Vigiliante, Ho!, Butternut Squash, Boxjam's Doodle
See also The Belfry Comics Index, The Webcomic List, Nth Degree, Comixpedia and Websnark.
Arthuriana sources I use or recommend:
Arthuriana - the Journal of Arthurian Studies; the website of the quarterly journal of the North American Branch of the International Arthurian Society.
The Camelot Project at the University of Rochester.
Camelot In Four Colors: A Survey of the Arthurian Legend in Comics
Mystical-WWW - The Arthurian A2Z knowledge Bank which has encyclopedically-arranged entries on the characters of the Arthurian legends.
Le Morte Darthur: Sir Thomas Malory's Book of King Arthur and of his Noble Knights of the Round Table, Volume 1 and Volume 2.