Thomson-Diggs Billhead

A few months ago, I purchased an eBay offering of a Thomson Diggs bill-head from 1924; they seem to crop up fairly regularly. The bill-head includes an illustration of the original portion of the Thomson Diggs building on R Street. The current building is much bigger than this early nucleus. It later included a first floor expansion on the West side (to the right of the building in the illustration) and then later still additional floors were added on top of that expansion. This illustration was one Thomson Diggs used in their 1920s catalogs that I've seen down at the Center for Sacramento History. Also of note is warehouse to the left of the main building. I think either this is an earlier and smaller version of the warehouse that I've seen later pictures of, or the picture is keeping this corrugated warehouse shorter than it was in reality. Perhaps this was done on purpose to not block the view of the main building.