We also get our first glimpse of another significant Windsor: Wallis Simpson. Note that, like the other Windsor women, she's wearing pearls, but rather than a double-stranded necklace, she's wearing a double-stranded bracelet. If pearl necklaces are the royal uniform, Wallis isn't quite there -- but she's close enough to royalty that it's about to handcuff her a bit.
I don't recall that Mary owned any brooches with heart-shaped pendants, but the bow here is shaped a little like the Kensington Bow Brooch (which has a baroque pearl pendant). We saw Mary wearing a scaled-down version of the same piece in the scene depicting Bertie's surgery in episode one. [Update: this is a replica version of one of Mary's little-seen wedding gifts -- see our discussion in the comments below!]
At the same time, though, Elizabeth is depicted as longing for the paternal advice that she can no longer get from her father. And Uncle David is more than happy to step in, offering advice about the family name and the proper home for the monarch. (In real life, David apparently found out that "the girl" wasn't a pushover; she took away his yearly allowance.)
Feel free to share your thoughts on the jewels of episode three -- but no spoilers, please! Look for my recap of episode four on Monday!