Fascinating! We'll share this page on twitter soon to see if we get any takers. In the meantime, feel free to take a pass at transcription using the plug-in, we'd be curious to hear how it goes. We always look at review as a safety net to let volunteers learn and experiment safely.
Thanks for finding and sharing!
Try it on Google Drive.
Upload the document and then open as Google Document.
Probably it will transcribe the text.