After yesterday's post, Tom Hart asked:
"When you're doing a quick painting of architecture, how likely are you to carefully draw with respect to perspective (checking horizon line, etc.) as opposed to free-wheeling it? I get the impression that for your longer plein aire sessions that include buildings you do a quite detailed drawing of the architecture. Is that right, and if so, how much by contrast do you wing it on these quicker sketches?"
The top image shows the picture partway finished, at the point of blocking in the main tones in watercolor with a brush. You can see the underdrawing just establishes the main lines, not the clapboards and smaller window details.
I added those smaller details with water-soluble colored pencils after the big tones were laid down.