MAIL TO CRIMEAN WAR GENERAL WHO INVENTED A HEATED CANNONBALL AS A BED-WARMER, Canada postal history 1863 cover to General Higginson, 9 Wilton Crescent, London with QV 12½c tied Montreal duplex dated AP 17 63. Grenadier Guards General Sir George Wentworth Alexander Higginson was born in Wilton Crescent Belgravia and during the Crimean War improvised a bed-warmer for the freezing nights by heating up a cannonball in the campfire. £225