don't you hate it when that happens. You throw your school stuff over a bridge hoping that the excuse can work with your teacher tomorrow, but in the same night a random woman comes to your door with your stuff. What a bit*h.
a heart felt thank you is good enough
Send her flowers
Give her a kiss, without too much tongue.
How very sweet of the stranger! Maybe get him/her a gift card for a coffe shop with a thank you note.... ??
i would have thrown it all in the nearest fire