While Mr. Fell is listing the tools that are available, one of the things he listed was "acetylene gas containers." But as Mr. Morrisey restates each tool, instead of gas containers, Mr. Morrisey says "gas chamber."
Mr. Fell tells that Mr. Morrisey was paroled when first he mentions him to Mr. Bliss, yet Mr. Bliss says a few minutes later that Mr. Morrisey is in prison and has to have it explained again to him.