I agree with Andy that the date may not quite ring true. We only have a couple of documented structures dating to the 1860's, but news accounts do indicate that the current OB Macaroni complex began when Fort Worth Macaroni Company acquired an existing structure on the site in 1905. It's unlikely, though, that any structure at that location would have been there for 40 or so years. Prior to the arrival of the T&P railroad in 1876, there was very sparse development south of town. The original stockyards stood near the site, with the pens concentrated along the rail lines just east of what's now Vickery and I-35. It's certainly possible that some sort of lodging house may have serviced the yards. The 1876 birdseye view does show a couple of structures in the vicinity. The first Union Depot opened in 1876 and Ginnochio Hotel came along many yaers later. Both stood north of the T&P tracks close to where Tower 55 remains today, just south of I-30 west of the mixmaster.
It would be fun if the new owners of the O B Macaroni buildings have found some evidence of prior use of the property, because we just don't have that much documentation of the early years. We know that the first stage lines operated from various locations from the courthouse square to the old hotel corner at 4th and Main, and I've never come across information about stage runs from anywhere else. There's a lot of unplowed history out there, though. I'm just grateful that the buildings have found new owners and can stick around for a while longer.