Missfired brick

• misfire: to fail to go off, explode or ignite

• fire: to shoot a missile from a gun → misfire = to shoot wildly → the Black Stone as a missile misfired from Heaven and knocking Tim Finnegan off his ladder → cubehouse

• fire: to bake a brick so as to harden it → a misfired brick crumbled causing Tim Finnegan to fall from an edifice he was building

• Miss Fire → Issy, whose voice is transmitted down the chimney flue from her dormer room upstairs to the fireplace in HCE's bedroom → avoice from afire (003.09)