Kindle 3 (Kindle keyboard) on Aer Lingus flight

Lost Kindle 3 (now called Kindle keyboard) on Aer Lingus flight EI0403 from Rome to Dublin, just before Christmas. May have stayed on the plane for some time (as it's small); may have turned up on other routes, if the plane was used for other routes. Full of political science reading material. No case. Very tiny crack in the plastic at one of the bottom corners of the screen.