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. Keep your firmest line for the Circus and the Crescent: they are small, and if you let them go soft you lose the one deliberate gesture on the sheet. The Avon can stay quiet; its shape is doing the work.