this area of design is the subject of different discipline with different approach. in the late 17th and early 18th century, came houses and cottages with stepped windows that were used for domestic weaving. here, "simple" means an appearance of a factor of the form . december 31 – an extra leap second (23:59:60) is added to end the year. after another injury, he ended his career in may 1998, 33 years old, and went on to become a sports agent in december that year. one of his best-known songs was "on mother kelly's doorstep". 