Dante's Inferno: sourced from https://www.gutenberg.org/ebooks/997
Pliny's Naturalis Historia: XML sourced from https://mlat.uzh.ch/browser?path=12281/12197, regexed to remove tags, cut down to books 1-7, some english removed manually
Der Meide Kranz: sourced from https://www.hs-augsburg.de/~harsch/germanica/Chronologie/14Jh/Muegeln/mue_intr.html, regexed to remove line numbers. Note that this is a poem so it's expected to be more regular than other types of text.