Treasure map XVI can be bought from the herbalist who has a hut in the forest located north-west from Samopesh.
Note - Purchasing a map is an optional step. Treasures can be found immediately by using the information contained in this guide.
Start your searches far to the south from Skalitz (south-west from Rovna). Find the place that lets you cross the river (the one drawn on the map). This place is presented in the picture.
Reach the southern shore. After that you have to move west while staying close to the river. Reach the big tree that grows near the river (the one marked in the picture). Examine the area close to the tree carefully. You will find a stash that contains Ash hunting bow and Hunting sword.