Great info for research. Thanks !
But , a word of caution when talking with Historical Society personal . Many years ago I did exactly as you mentioned and in the course of a conversation , I mentioned MDing older areas of the county . It was as if someone threw a light switch for attitude . Suddenly I felt as though I was viewed as a thief of historical sites . From that point on , my questions were answered with very short negative type responces . I got the hint and never returned unless I was buying more books for my collection on local history . Needless to say , I did NOT join the Society membership .