Another class from the Manual has been transcribed: The Sidhe
Aurania was definitely a campaign world, but we don't know much about it so far other than what is written briefly in the Manual: "Aurania is a universe of around ten or so dungeons, (of which only three are commonly used) and even more players. Aurania by-the-by means place of gold, a reference to the large piles of the stuff collected by the player characters in our early campaigns".
According to Playing at the World, D&D really took off in LA in 1975. Gygax's version of Daniel's group's Thief first came out in the summer of 1974 in a newsletter. So Daniel's group, playing in early 1974, were definitely innovating ahead of most.
There's been little discussion of Aurania outside a few posts by collectors at the Acaeum until Playing at the World, which has a few paragraphs about it. The mention of the Beorning class is what led me to it - J. Eric Holmes mentions a Beorning character in one of his session summaries in Alarums & Excursions. I found that Daniel was an active poster on the Pathfinder message forums. Hopefully it will get a little more exposure now.