GENERAL KNOWLEDGE: What did Sir Lancelots adultery prevent him from finding?

Questions

in the original story, of what were cinderella's slippers actually made?

in the original version of the fly what was the fly saying as the movie ended?

in the pioneer spacecraft, what are the humans on the plaques wearing?

in the rhyme about magpies 'one for sorrow, two for joy' what are 6 magpies for?

in the soap 'one life to live' who was vicky's alter ego?