In order to post images of the scanned letters, I need to convert the PDF scans to JPG files, one for each page, and my PDF viewer, Preview, will only convert one page of a PDF at a time. That would be a time-consuming task when you have hundreds of PDFs that may each be 5-6 pages or more, so I’m looking for a batch converter for my iMac. I’m narrowing it down to a couple, leaning toward one that automates the process and puts each letter bundle into its own folder.

4/24/2020: Well, that didn’t work. In the end, all the image files were created one by one in Apple Preview.

Yes, it means I finally started creating pages for the letters.