Inside the Lumbridge Swamp Caves by using a candle lantern (or black candle lantern) during the backpack, should you fall short the jumps on to stepping stones and "swim on the floor", you will get hold of a candle (or black candle) and some broken glass. Glazing, or frame glass, https://glass-near-me-ottawa45667.izrablog.com/32282775/fire-rated-glass-no-further-a-mystery