Pieces of string

There's a story going around about somebody who died leaving belongings which included a box labelled 'pieces of string too short to be useful: Now, that might just be a joke or an urban myth, but it could well have happened, because which of us doesn't keep stuff we secretly know to be useless? And - to be fair - what is useless to one person might be invaluable to another. Those pieces of string might be too short to tie