Lovely Guimarães (Sketch for Painting) as of July 27, 2020

I am getting ready to start another watercolor painting. This is going to be based on a photo that I took on a lovely street in Guimarães, Portugal, last July.  My photo reference is posted here on July 25.  Today I continued with my sketch. I am trying to get the perspective right, and struggling to make all those buildings go downhill. It is hard to fix mistakes in watercolor, so I want to get the placement right before I start to paint.