http://boggswood.blogspot.hu/2018/01/th ... g.html?m=1
For D&D archaeologists, Tonisborg is like the lost city of Atlantis. Hints and whispers of this very early Blackmoor spin off have excited the imagination of researchers for decades.
Of course, it was inevitable that the game that became Dungeons & Dragons would spread beyond the confines of Blackmoor and Greyhawk. It didn't take long for some of those among the pool of original players, to begin developing their own dungeon lairs, following the examples of their mentor, either Arneson or Gygax. Rob Kuntz's Castle El Raja Key is perhaps the best known example, but there is also Tonisborg, from one of the central Twin Cities players; a megadungeon which held the promise of shedding light on early Blackmoor gaming. Tonisborg was the brainchild of Greg Svenson, who started playing with Arneson and co. when he was still in High School in 1969, and is best known to D&D fans as the creator of the iconic "Great Svenny" character.
"I built a city, called Tonisborg, complete with a dungeon and a network of catacombs, during 1973 and ran many adventures there and all around the Blackmoor area in 1973 and 1974 using the play test rules for the original three little books and then the published books. Tonisborg was located approximately where Vestfold is on the current Blackmoor area maps, for anyone who is interested.
I loaned my materials to one of the other guys in 1980 so he could run an adventure for a new gaming group and never saw them again. He just said he lost them. Oh well..."
