The empty drainage trench in the laundry cellar was now fully dry, its floor covered in a crust of white lime powder and scraped silt. Ada Morland knelt on a burlap mat, her navy blue overalls smudged with pipe dope and Yorkshire soot, a ten-inch steel fine-scale depth gauge held firmly in her calloused fingers. She adjusted her reading glasses. She peeked through the twin lenses at a level scar etched deep into the limestone foundation wall where the sewer pipe pierced the bedrock.
Ada’s knees cracked as she shifted her weight on the cold stone. She had crossed through the Courtesy Arch at 12:15 PM sharp, straight from the cab of her Ford Transit parked outside a heavy-duty park in Leeds. That brought her favorite brass scraping pick and a building hair-width. She had twenty minutes of her lunch break left, and she wasn’t about to waste it on pleasantries. Beside her, Pella held an animal fat candle close to the wall, lighting up the jagged, chalky recess.
‘Look at that groove, Pella,’ Ada said, her sharp Yorkshire voice cutting through the damp cellar air like a cold chisel. She slid the fine-scale rod into the crevice until it clicked against solid stone. ‘Fourteen and a half tiny fractions of an inch of chemical erosion. That isn’t clockwork scour from water flow. Water leaves smooth, rounded troughs. This is acidic leaching from high-heat rotten-egg stone salt water under pressure. Do you know how long it takes stone water to…
