This diagram can be purchased from the following merchants:
- Handlarz w Tartak na Ard Skellig
- the Płatnerz in Larvik
- the Płatnerz in Twierdza Kaer Trolde
- the Płatnerz in Przystań w Urialli
Other copies can be found in the following locations:
- Chest in the Emperor's quarters of the Zamek Królewski w Wyzimie
- Tunnel behind a breakable wall in Krypty rodziny Evereców