First, Thanks to y'all for your valiant efforts creating this functionality
1) Both single and double-column generation worked fine for me (p.s., I like the 2-column version, makes for easier reading)
2) I noticed, when generating pdf's for the article at WikiSource (https://en.wikisource.org/wiki/Occasional_Discourse_on_the_Negro_Question) the Author was missing in the pdf's.
3) The pdf's font size is a bit small for my ageing eyes; I hafta zoom in a couple of notches on my 17" laptop to read it (yes, with my reading glasses on :-) )
4) When checking functionality of hyperlinks in the pdf's, most seemed to work OK, but I happened upon a link to works @ "Internet Archive" that didn't work as expected – it loaded the Internet Archive website but the search field was filled with the likes of "%28%28subject%3A%22Carlyle%2C%20Thomas%22%20OR%20subject%3A%22Thomas%20Carlyle...". The link in the original Wikipedia article works OK) ref: https://en.wikipedia.org/wiki/Thomas_Carlyle