im also a sturm descendent. my sturms were from jacob and catherine freshour sturm of md and va and wva.there was a lloyd elmer sturm who wrote a book called the descendents of jacob sturm of sharpsburg, md from 1750-1938.i have it on microfilm which i bought quite a few years ago from a place called UMI which might be the University of Michigan as its listed as being in ann arbor, michigan. i dont even know if you can still purchase it or how i found it but any large library that has things on microfilm and uses that company can tell you. its listed as catalog #OP65319.that might be the right one that was your grandfather. i hope this helps you.