Proposed LeaseGlasscock County, Texas

Well, I am a newbie, and have been reading like crazy to try to become a bit more educated.

I am the mineral rights owner of 185 acres located in Block 29, Section 185, W.&N.W.RR co., Glascock County, Texas. Some 40 years ago, my grandparents had leased the rights, but no lease has existed since. We have been contacted by a landman, and are still researching prior to any sort of response.

I have learned much - have much, much more to learn obviously. The thing I have not been able to ascertain in all my research is what would represent a fair bonus, royalty and term for like property. Any help would be appreciated.