Thank you, Toby again. This was a great reminder for me that I should loosen up before I start urban sketching. Your exercises helped me recognize how difficult is for me to do the hatching right. I still have many open questions: should I always follow the same order of line directions? What about hatching objects in an angel, like roofs. Should the lines be parallel with the roof? Also for me hatching for continuous line drawing is wobbly and continuous as well. 
I wish I had time today to work on the « real » part. I loved the sky you painted at the very end.