Walking down memory lane with letters, yes I do the same and have kept many over the years.

Stencil, I still have one used for special requirement during school years, name, standard and subject was required on front brown paper cover clearly marked neatly....

Childhood letters I have a good giggle, children always say it the way the see it, honestly that one from Matthew is priceless... Mal hond!

Enjoy your holiday in the fairest Cape.