Jocelyn Harris mentioned in her talk "Who is Captain Wentworth" that this a reference to a specific historical person who painted Austen's brother Frank's (a sailor) portrait. The Thing about Austen podcast does a full episode (29) on this miniature.

She still can't be open with Lady Russell about her feelings for Captain Wentworth and what she thinks his feelings are for her

He's attempting to "rescue" her again (this would make it 3 if he succeeded) how terrible for him that she is instead "rescued" but her cousin, the very man who's attention awakened him to his own feelings

I don't understand why she doesn't tell them. Is it because she's aware they think Captain Wentworth will marry Louisa? Is the engagement not sufficiently public? It's such a great piece of gossip! Though Anne is not one to gossip, perhaps she might have behaved differently were it not a "visit of ceremony" and her family not present

Interesting echo to Lady Russell's thoughts about "the man who at twenty-three had seemed to understand somewhat of the value of an Anne Elliot, should, eight years afterwards, be charmed by a Louisa Musgrove" (Persuasion Chapter 13). She thinks it speaks badly of him to find someone superior to Anne, just as Anne almost can't believe that Louise prefers anyone to Captain Wentworth.

I think this is why we glimpse Captain Wentworth sneering at Mary when she's being a snob and rolling his eyes at Mrs Musgrove when she's grieving her useless son. We see his humanity. His is a "frank...open-hearted..eager character" who's sincerity she can depend on because he "sometimes looked or said a careless or hasty thing"

The 2007 adaptation makes this a reality - Captain Wentworth buys Kellynch as a "wedding present". It's a shame because it seems to be closing her prospects rather than opening them as they would be with the possibility of travelling the world with her husband.

This is a great cliff hanger to end the first volume. Will Louisa live? It seems like Captain Wentworth intends to marry her but what about Anne? and what of the mysterious cousin and heir?

In the 2007 and 2022 adaptations Captain Harville gives the impression that he knows who Anne is ie at some point Captain Wentworth told him of their history, likely they were at sea together directly after

The result of the conversation with Captain Wentworth while in the hedgerow

Weird that Louisa says this, which is exactly what happened to Wentworth, but he doesn't believe that's the case

Even if things don't work out between Henrietta and Mr Hayter, Louisa is shit talking her enough to ruin her chances with Captain Wentworth, all the while ensuing he knows that Louisa herself isn't like that

It seems like Louisa is determined to patch things up between Mr Hayter and Henrietta...potentially so she can have Captain Wentworth to herself

It's unclear if Captain Wentworth honestly thinks women require more care and better accommodations or whether he is avoiding women in general because of Anne. This line of Mrs Croft's is beautiful. There is a modern web series adaptation called Rational Creatures. I think this is an echo of Mary Wollstonecraft, Austen uses the term again when Elizabeth Bennet is rejecting Mr Collins proposal (P&P chapter 19)

Captain Wentworth is too polite to say what he really thought of Dick Musgrove but, unlike Mr Elliot, he does show his emotions and thoughts aren't always pleasant

This must be painful for both Anne and Wentworth, the period referring to was just after their broken engagement and here the Admiral is speaking of wives. Austen doesn't point this out - it's up to the reader to "read the room"

This implies that he wouldn't have said anything like this if he knew it would be repeated to Anne and that he spoke without thinking - he's still hurt over their breakup and perhaps wanted to say something hurtful

This shows part of Captain Wentworth's character, his midshipmen are young and need guidance which he is providing

In Jane Austen The Secret Radical Helena Kelly posits that Anne and Captain Wentworth are not in love at the beginning of the book, but fall back in love during the course of the novel.