"Stitch?" I guess that would be one way to describe it. What I want is to combine two or more JPEGs into one document so that when anyone opens the document, all the separate images open on one page (or window.) Where each JPEG is less than the length of a sheet of paper, I would prefer to have all the images on one page, so that a reader may scroll up and down. Doing so permits easier reading and comparison of the texts on what had been separate pages. For example, if I want to show a paragraph on Page 37 and present a different paragraph on Page 242, placing the two paragraphs in one open file window makes the job of comparison a whole lot easier.
But one file with multiple pages would still be better than two different documents that readers would have to locate and open separately.
I was hoping to avoid converting the files into PDFs and then back into JPEGs. It would be more convenient to combine the JPEGs without going through conversion to PDF and back.