Original Sketch Design: Tyringham Gateway
Original Sketch Design: Tyringham Gateway Vol. 42/164
Soane would draw the basic design quickly and simply but with all the essential forms and proportions correctly shown. See how he knows exactly what he wants to convey to the draughtsman who will carefully re-draw it. (This is for a gateway for a house in Buckinghamshire called Tyringham, drawn in 1794).
You can see the working drawing made from this sketch in the next image.