I remember dd1's godmother saying that she'd looked at the post and decided it was about the "Three Ps":
Post
Prayer
Presents
Obviously the prayer would be private. Bill wouldn't have been doing post for Len most of the time-although it might have been nice if the others had been seen to get some, but couldn't they have had a little "oh my special present from my godmother" type thing. It's totally forgotten about after the original event, which actually is quite dismissive of it as a position, and slightly strange considering EBD's emphasis on religion.
I've not read reunion, but I can't think Madge wouldn't have come, barring huge emergencies. I wouldn't have thought the invite would come from Joey though, surely it would be Miss A's job as head to invite her as the honoured guest?
If she really didn't want Madge there she should have started the reunion with a letter from Madge with some good reason why she ccouldn't come.
If you think she travels back from Canada when Mollie's having her operation, and she wouldn't have had long to plan that. With 6 months notice, which she must have had, I'm sure she would have come.
Maybe Joey told her the wrong week:
"Madge!" Miss Annersley looked up in surprise. "How lovely to see you!"
Madge came in and sat down thankfully.
"You look surprised to see me," she smiled happily. "You couldn't imagine I'd stay away at such a time."
Miss Annersley's question was drowned by the flinging open of the door.
"Hilda!" Joey rushed in. "Have you...?"
Her voice tailed off slightly as Madge rose to greet her.
"Joey!" Madge looked fondly at the slight figure in front of her. "You're looking well, how is everyone?"
"Fine," said Joey, looking towards the window. "We're all fine. But I came to ask Hilda if I can take the triplets out of school this week. Felicity isn't well again, and I'm meant to be finishing my proofs for my new book. I couldn't get on with it last week."
Her black eyes twinkled at Miss A.
"Aren't we all going to be busy this week?" Madame asked, a little puzzled. "When is everyone arriving?"
There was a long pause, during which Joey suddenly became interested in something out in the garden.
"The reunion? Or anniversary?"
"That was last week," Miss A said slowly, wondering if Madge's memory was going.
Madges face dropped. "But you said, the 5th?"
"I didn't," Joey said quickly. "I definitely didn't. Why would I?"
Madge fumbled into her bag.
"I have the letter here."
Joey glanced at her watch.
"I really must go. I can take the triplets, Hilda, can't I? Catch up with..."
Hilda glanced at the letter, and looked back at Joey, who was flushed and edging towards the door.
"Jo," she said gently, "you have given the wrong date."
"You know how disorganised I am, I'm just so busy I really can't remember everything... I never could remember dates and things."
She exitted quickly, leaving Madge and Miss Annersley staring at each other.
"Oh dear! She is such an excitable creature, I suppose I better call Jack to calm her down," said Miss Annersley.
"Yes," sighed Madge. "That's why she can write so well. What a pity, but a genuine accident I'm sure!"