The first of the two horses below was copied from Leonardo da Vinci but his is better than mine, of course. The other horse is copied from a Rennaisance guide to drawing, the idea being that a figure can be built up with a series of small squares and rectangles approximating to the shape/outline of the figure. That second horse sketch was further developed into a painting to show something similar to the white horses etched into the English landscape.
The second picture of a lady at the bus stop came out of my head; the bus stop sign is of the old Tyne & Wear transport logo before they were all privatised.
The gentleman sitting at the table was one of a series of quick sketches from life during one of my art classes.