@impending-doom Based on the thread title, my first thought was why they weren’t married off individually rather than to each other.

Economy is likely the best and main reason. The series is about Aslan and Narnia, the country, and whilst there were visitors, to have them married off in some cases might well have introduced new characters that would need explaining. That, in my opinion, is why Susan's non-presence in Last Battle likely signified that perhaps she'd already tied the knot. Yes, C.S. Lewis did write a letter claiming that Susan had grown vain & proud, but there was time for her to get back to Narnia in her own way. Perhaps Susan was a proper Bridezilla to her family.  

And, after all, there is a clause in the Anglican wedding ceremony where both bride & groom make their promises until "death doth them part": "Forsaking all others". Realistically, how much could someone like Susan or especially Polly share with a partner who wasn't "in the Narnia loop"? That is the trouble about marriage. Much as I might have liked to go to visit places like Whitby in England or Italy or Spain, I have to mind first my own family commitments, how much we can afford, work commitments, or health problems. And most of all, when travelling with my husband, I have to be also mindful of his desire to reconnect with friends from when he lived in Scotland, and also what he'd like to see - that sort of thing. 

I think it was Jill and Eustace whom I thought might get married had they lived, especially when in Last Battle, they seemed to get along so much better than in The Silver Chair. But then, as the Last Battle proceeds to its end, they can spend all their time together, married or not. 

@impending-doom I do think it’s a little odd that Polly never married anyone at all.

That depends on how old you are, when after both WW1 & WW2 it was quite common for there to be heaps of single women, working as secretaries, teachers, or in factories, not only in Australia, New Zealand & UK, but elsewhere, maybe in Canada & definitely in Europe. I've been to the Northern France battlefield cemeteries. Such a loss of life needs to be seen to be understood, I think, though it also features heavily in the first half of the 20th century literature.  Back on RE: Tome & Folio - Books: Third Edition, people who have read LM Montgomery's Anne of Green Gables series, might remember that her son, Walter, is killed on the Western Front in 1917, whilst Australia's Billabong series also had a Walter, or Wally, who married Norah Linton, the Little Bush Maid, & who seemed to suffer from what we would later called Post Traumatic Stress Disorder, after he returned with her elder brother, Jim, from WW1 trench warfare. Yes, Polly might very well have had a sweetheart in the trenches, who never made it to the Armistice, maybe even a fiancé. C.S Lewis covers that eventuality, I think, the way he depicts why Mr & Mrs Pevensie don't go to Narnia Heaven, even though they, too, were killed in the train crash.

@the-old-maid And happy early 55th anniversary to you!  

Thank you for the good wishes, which I deeply appreciate, when I can scarcely believe we even made it that far in life together, when we've both had health problems right up to the present. 

Posted by: @impending-doom

I do think it’s a little odd that Polly never married anyone at all. That said, it could just be a practical choice by Lewis — keeping her unmarried avoids having to introduce or explain an absent spouse, or spend extra word count in The Last Battle dealing with someone Polly would reasonably ask about once she arrives in New Narnia. 

Many women of that generation did not marry, due to so many of the men of their generation being slaughtered in the Great War (WW1).  In my youth there were lots of older single ladies.