The scripts that Fields gives to Bannerman are way too think. Some seemed to be 200 pages or more. In the 30s comedies were only one or two reels. That was half an hour max. A script for one would have been only around 30 pages.
The siren of the ambulance transporting W.C. Fields to the hospital is a modern electronic version, not the air driven type that would have been in use in the forties when he last lived.