I was wondering what had happened to these photos and I am happy to have found them in an entry of 2015 on Cairo.
Happy days indeed, here I am at the Ibn Tulun Mosque in Cairo in July 1990, I was 34 then and I had a full head of blue black hair then. I am bare feet since you must not enter the precinct of a Mosque wearing shoes. A bit like removing your hat in a Christian Church or covering your head in a Synagogue. A sign of respect.
Ibn Tulun was deserted, we were visiting in the afternoon between prayer times. Such an ancient place so fascinating.