TRAVELING ALONE, Part 11— Continuing my story about travel and art in Egypt (finally!): Sketching in the Streets of Cairo: In 1990 I sketched in the Khan el Kahlili, the main bazaar in Cairo, which stretches along the main thoroughfare in the Fatimid section of the city (built about 1000 years ago). The section is also called Medieval Cairo. After I asked permission to lean against his wall, a shopkeeper gave me a bucket to sit on, which was very welcomed (I didn’t NEED to ask, but it was a g…