Determined to use the divider in spite of what Mother Nature might have in store, I went to Atwater market.
The first attempt was using the divider for the main lines, the rest I eyeballed. I wanted a building that holds together, not a photographic rendering. I am interested in the feel of the sketch than in the accuracy of every detail. I can take a picture for that purpose.
For the next attempt I used a caligraphy pen and no divider - I had to work fast and skip details.