A copy of this diagram can be purchased from the following merchants:
- Yanne, the blacksmith at Twierdza Kaer Trolde
- Kowal in Wieś Arinbjorn
- Kowal (Ferlund)Kowal]] in Wieś Ferlund
- Kowal in Fyresdal
- Handlarz at the Samotna chata on Hindarsfjall
- Kowal in Svorlag
Other copies can be found in the following locations:
- chest in the elven ruins beneath Oxenfurt, during the quest "Wielka ucieczka"