Begin Treasure Maps
In 1992, Slade Henson published this unusual treasure-map themed supplement/module. It features visual treasure maps for players, and a DM’s copy for himself with what is on the back. The players find the map somewhere, hunt it down, and then explore and face the results. It’s very simple.
I will be using at least one map from these, which fits the Sand Mire campaign perfectly. I don’t know about any others though. It’s not a well-known or received supplement.,