Ah! I was wondering what that change signified. I assumed it was just a corrected mistake, but you're right, it changes the gender of the third generation. Very interesting.
I think I can picture him, writing "...give their sons a right to study Painting, Poetry, Musick, Architecture, Statuary,... hmm, Tapestry... and Porcelaine? Let's make it 'children'!" ツ
