Progress continues on the kirtle, but there's not much to show. I've cut the skirts, and I'm working my way through those long seams.
Instead, here's some link-spam from the British Library. Unfortunately, the BL's viewer, while very good, appears to be a bit 'sticky', in that these direct links may try to load the manuscript you just viewed instead of the one that's actually specified. If you have trouble, head to the manuscript index page (also linked), load the viewer from there, and then select the folio as needed.
In all cases, I've selected a few images of particular interest, and there are generally several other pages that feature the style.
The Breviary of Queen Isabella of Castile - begun in the Netherlands in the 1480s, portions later
f.3v, shows back of gown
f.417r, St. Martha, c. 1500 - square neck kirtle
Hours of Joanna I of Castile - produced in Flanders 1486-1506
f.5r, lady in gown and working woman in kirtle
f.6r, alternative gown with a skinny V-neck
f.26r, miniature of Joanna of Castile. She's got wider sleeves than I'd normally categorize as being this style (probably later, and/or a regional difference), and her headwear is in the French hood style.
f.288r, additional miniature of Joanna of Castile
'London Rothschild Hours' or the 'Hours of Joanna I of Castile - southern Netherlands, c. 1500
f.2v, lady in gown and working woman in kirtle
f.7r, working women, including V-back kirtle
Filippus Albericus, Tabula Cebetis, De mortis effectibus and other poems - France, Central (Paris); 1507
f.6v, allegorical depictions (and not the virtuous ones)