Hummingfrog,
The building is still there, the company is now called Bass Rutledge Drug and for reference is on the SW corner of the junction of West Moore Avenue (I80) and divides N and S. Francis Street. If you have access to Google earth, search for Bass Drug Company, Terrell, Texas and street view will put you right back in to that parade. Great to see such photographs, they deserve an airing. Hope that's useful.
Smudge