The young workman leans over the course he is building: his left hand presses a brick into wet mortar while the right grips a brick hammer. He wears a folded paper cap, a red-and-white striped shirt and blue work trousers. The base carries the rest of the job — a long-handled shovel, a trough of mortar, stacked bricks and sand sacks, with a wicker-covered flask standing on the top course. White joints run clean between the red bricks.