A Miss Bat/Mr Rowan-Webb headcanon/prompt:
When other methods of discovering Algernon’s whereabouts have been exhausted, Gwen tries reaching him by letter. She starts with spells associated with the modern post and works her way backward into those spells that were used in previous iterations of the postal system.
One of the spells almost works - the letter is returned to her heavily and mysteriously water-damaged.
Some of the letters disappear entirely - whether that means they reach him or not Gwen has no idea - the ones that truly disappear also become untraceable.
Through an interesting set of circumstances, one wayward letter ends up reuniting a different set of separated lovers.
When she has run out of spells to try, she doesn’t stop writing. Instead she takes the letters and keeps them first in a box, then, when they grow too numerous for the box, she ties them with ribbon and puts them in a drawer.
Every once in a while she takes one of the letters and sends it off via one of the spells that caused the letter it was attached to disappear completely, in hopes that some of them are reaching Algernon, wherever he is.
The collection of letters is one of the first things she shows him when he returns.
“I’ve been writing to you,” she says, flicking the drawer open with a smidge of magic. “You’ve been here,” she taps her heart, “all this time.”
His vision is suspiciously blurry.
“And you,” he echoes thickly, reaching out one finger to the locket now around her neck once more, “have always been in mine.”
