Letter to lighthouse keeper is a quest item in The Witcher 3: Wild Hunt.
During Contract: The Phantom of Eldberg, this can be found inside Eldberg Lighthouse after getting the lighthouse key from Mikkjal. However, note that Geralt must unlock the door before returning to Mikkjal, or he'll never be able to enter and find the letter. Reading it will lead to some additional dialogue with the lighthouse keeper.
Journal entry[]
- Got work for you, Mikkjal. A ship's going to sail from Faroe to Arinbjorn with a load of hides on board. At midnight you're to put out the light in the lighthouse and keep it dark until we give the sign with our torch. We'll split the loot same as always - you'll get a tenth of what the sea tosses ashore.
- Till we meet again.