 Three days later, on the final day of the Siege of Calais, Balthasar claimed two Spitfires over the port.Six Spitfires were shot down after combat with Bf 109s this day; No.19 Squadron RAF lost three destroyed and two damaged; Squadron leader GD Stephenson was captured and sent to Colidtz prison, Pilot Officer PV Wilson died of wounds on 28 May, Sergeant CA Irwin was killed, Pilot Officer MD Lyne and Flying Officer GE Ball were wounded.