The PDFs are much nicer !
Thanks for pointing that out.
For some reason, the stitched-together images did not upload at full (best) size.
Each single page pdf arrives in Irfanview as 793 x 1123 pixels. There is some overlap on the pages, but the stitched together images on my computer are each roughly 3000 x 1123, so no worse resolution than the single page pdfs.
If you know of a way to put the full image into a post (or a pdf, which I made at A2 paper size), I would be glad to know.
Thanks.