premise: Thus shielded , we played many foolish games in comfortable unselfconsciousness ; even when the fences became a part of the game - when a vine embowered gate-post was the Sleeping Beauty 's enchanted castle , or when Rapunzel let down her golden hair from beneath the crocketed spire , even then we paid little heed to those who went by on the <mask> outside .
hypothesis: the proper context for <mask> here should be a way especially designed for a particular use