I truly wish there was, but the background lore for the elves comes down to one paragraph on the Mondains Legacy webpage. We have more information on Ratmen and Orcs than we do about Elves. The majority of roleplayers have chosen to either draw from Tokien or Forgotten Realms lore for their inspiration.
Once upon a time, the Elves lived amongst humans. They occasionally intermarried. The Heartwood was tied to the world in some mystical manner. They disappeared during the First War of Darkness, and have only reappeared. A commoner is likely to have believed Elves to be a fairy tale, but the oldest Britannians are probably old enough to remember the Fey Folk.