The palette
One colour carries this city: the honey of Bath stone, laid as a light weave over the centre. Bring the green of the hills into immediate contact with that weave, with no suburban buffer between them, because the whole point of the drawing is a town shut inside its bowl. The Circus and the Crescent are the one deliberate gesture on the sheet, and they are small. A map cannot give them a line of their own, so give every street a firm line, or they will go soft with the rest. The Avon can stay quiet; its shape is doing the work.