Spent a day doing some more research at the Harris County Department of Education Records Storage Facility. Great people there! It's the only place left to find some of the original records for the old Harris County Common School Districts.

It's a BIG storage facility:

Went to lunch at Pizza Inn (who knew there were any left around!), then went over to the Harris County Land Records office (it's just down the road from the HCDE Facility):

I found some good additions to my research. I now have all of the School Trustees for Districts 28 and 35 from 1907-1918. I also found just about all School Trustees for District 29 from 1907-1935.

I also pulled some documents on Spring ISD (from when they first became Spring ISD), and on District 48...which eventually became North Forest.