The picture on page 237 of Ember's End is wrong on at least one aspect, (There could be more, but I don't see any.) Go back and look at it. I will post the error in the comments.
@The Fowlers I think that's when he wears the back-scabbard, is it not? So he may be wearing a sword that we can't see. Also, I was going to post something about the armor myself when I noticed it was already here! It was bugging me so bad! And is it just me, or did the color of Heather's dress change between the last two books? I mentioned it to my friend and he thought I was crazy, but I think it changed.
Smalls is not wearing armor in the picture, but in the story he is.