inscribed in fibre-tipped pen on reverse u.c.: Howard / 19 / Hodgkin 99 inscribed in red fibre-tipped pen on reverse u.c.: (upward arrow) inscribed in fibre-tipped pen on reverse u.c.r.: NIGHT + DAY inscribed (diagonally) in fibre-tipped pen on reverse u.c.r.: 1997-99 inscribed (vertically) in fibre-tipped pen on reverse c.l.: Howard 19 / Hodgkin 99 inscribed (inverted) (diagonally) in fibre-tipped pen on reverse l.c.: Howard / Hodgkin
