So the original shorthand version is still in storage?
Your reading comprehension skills are extremely poor. What part of "no copies exist" confuses you?
"No transcript has survived as to the appellant's evidence in chief, although it seems clear from the summing up that it was entirely consistent with that which he had told the police. A transcript of his cross-examination is available. In cross-examination the appellant said Sheila Caffell had frequent delusions and had spoken to him of suicide."
No copies of his testimony in chief period have survived in possession of the Crown and if the defense had ordered copies they failed to produce any of them to the COA instead proffering they didn't have a copy either. The shorthand notes would be disposed of after 5 years. If an appeal was filed within 5 years then they translated the shorthand into a complete transcript to be kept on file. They lost he transcript that covered his testimony in chief. Someone probably was reading it at some point and never returned it to the file or returned it to the wrong file.