Relative proper motion vectors of the stars in Berkeley 59 shown overplotted on a DSS red image. The color and direction of the bars extending from the black dots (the sources) indicate the direction of the movement. The concentric circles mark radii of (10, 20, 30, 40)′ from the center. The white star marks the highest surface density, which we took as the center. For a zoomed-in version see Fig. B.1.